Valgrind warnings in buildbot after a set of mroonga tests

***Warnings generated in error logs during shutdown after running tests: mroonga/storage.optimization_order_limit_optimized_time_greater_than mroonga/storage.variable_version mroonga/storage.variable_log_level_TODO_SPLIT_ME mroonga/storage.optimization_order_limit_optimized_time_between_over mroonga/storage.optimization_order_limit_optimized_int_less_than_or_equal mroonga/storage.optimization_order_limit_optimized_int_greater_than_or_equal mroonga/storage.optimization_order_limit_optimized_datetime_between_over mroonga/storage.information_schema_tables_data_length mroonga/storage.optimization_order_limit_optimized_year_between mroonga/storage.variable_max_n_records_for_estimate_session mroonga/storage.update_virtual_column mroonga/storage.optimization_order_limit_optimized_order_by_id mroonga/storage.optimization_order_limit_not_optimized_disabled mroonga/storage.variable_lock_timeout_valid mroonga/storage.optimization_order_limit_optimized_int_less_than mroonga/storage.optimization_order_limit_not_optimized_no_limit mroonga/storage.optimization_order_limit_optimized_year_greater_than mroonga/storage.optimization_order_limit_optimized_time_equal mroonga/wrapper.alter_table_disable_keys_updating mroonga/storage.variable_boolean_mode_syntax_flags_allow_column mroonga/storage.optimization_order_limit_optimized_time_between mroonga/storage.lock_tables_read mroonga/storage.variable_match_escalation_threshold_session mroonga/storage.optimization_order_limit_optimized_order_by_match_against mroonga/storage.select_empty_key_where_not_equal mroonga/storage.select_pkey mroonga/storage.temporary_table mroonga/storage.optimization_order_limit_optimized_order_by_desc mroonga/storage.index_read_primary_varchar mroonga/storage.variable_default_parser_same_value mroonga/storage.index_unique_search_after_duplicated mroonga/storage.optimization_order_limit_optimized_duplicated_order_by_columns mroonga/storage.optimization_order_limit_optimized_int_greater_than mroonga/storage.index_update_multiple_column mroonga/storage.variable_default_parser_new_value mroonga/storage.optimization_count_skip_after_insert_multithread mroonga/storage.index_unique_varchar mroonga/storage.sub_query_fulltext mroonga/storage.optimization_order_limit_optimized_no_where_clause mroonga/storage.variable_lock_timeout_invalid mroonga/storage.select_secondary_key mroonga/storage.optimization_order_limit_optimized_year_between_over mroonga/storage.optimization_order_limit_optimized_no_primary_key mroonga/storage.insert_on_duplicate_key_update_primary_key mroonga/storage.optimization_order_limit_optimized_year_equal mroonga/storage.truncate mroonga/storage.information_schema_plugins mroonga/storage.select_empty_key_where_equal mroonga/storage.variable_log_file_same_value mroonga/storage.like_unicode_ci mroonga/storage.optimization_count_skip_TODO_SPLIT_ME mroonga/storage.select_group_by_with_index mroonga/storage.variable_dry_write_delete mroonga/storage.variable_log_file_new_value mroonga/storage.information_schema_tables_auto_increment_use mroonga/storage.variable_lock_timeout_disable mroonga/storage.optimization_order_limit_optimized_datetime_between mroonga/storage.optimization_order_limit_optimized_have_primary_key mroonga/wrapper.fulltext_myisam mroonga/storage.variable_dry_write_insert mroonga/storage.update_int mroonga/storage.variable_max_n_records_for_estimate_global mroonga/storage.index_read_multiple_tinyint mroonga/storage.show_create_table_TODO_SPLIT_ME mroonga/storage.optimization_count_skip_after_insert_single_thread mroonga/storage.optimization_order_limit_optimized_int_between mroonga/storage.optimization_order_limit_optimized_time_less_than mroonga/storage.optimization_order_limit_optimized_order_by_asc mroonga/storage.index_unique_delete_by_primary_key mroonga/storage.optimization_order_limit_optimized_datetime_greater_than mroonga/storage.variable_vector_column_delimiter mroonga/storage.select_group_by_without_index mroonga/storage.index_read_primary_int mroonga/storage.repair_table_no_index_file mroonga/storage.replace_varchar mroonga/wrapper.insert_on_duplicate_key_update_multiple_column_primary_key_myisam mroonga/storage.index_read_multiple_smallint mroonga/storage.index_read_multiple_smallint_unsigned mroonga/storage.variable_boolean_mode_syntax_flags_allow_update mroonga/storage.update_id_hash_index mroonga/storage.variable_match_escalation_threshold_global mroonga/storage.replace_text mroonga/storage.index_unique_insert_after_error mroonga/storage.insert_delayed mroonga/storage.optimization_order_limit_optimized_int_equal mroonga/storage.variable_boolean_mode_syntax_flags_syntax_script mroonga/storage.variable_log_file_nonexistent_path mroonga/storage.index_read_multiple_varchar mroonga/storage.replace_without_key mroonga/storage.insert_on_duplicate_key_update_unique_key mroonga/storage.optimization_order_limit_optimized_datetime_less_than mroonga/storage.optimization_order_limit_optimized_select_match_against mroonga/storage.variable_boolean_mode_syntax_flags_syntax_query mroonga/storage.index_read_multiple_tinyint_unsigned mroonga/storage.update_fulltext mroonga/storage.optimization_count_skip_disabled mroonga/storage.replace_vector mroonga/storage.optimization_order_limit_optimized_year_less_than mroonga/storage.variable_database_path_prefix mroonga/storage.update_last_insert_grn_id mroonga/storage.optimization_order_limit_optimized_int_between_over mroonga/storage.variable_dry_write_update mroonga/storage.variable_boolean_mode_syntax_flags_allow_leading_not mroonga/storage.index_read_normal_varchar mroonga/storage.insert_TODO_SPLIT_ME mroonga/storage.optimization_order_limit_optimized_time_greater_than_or_equal mroonga/wrapper.insert_on_duplicate_key_update_multiple_column_unique_index_myisam mroonga/storage.index_read_normal_int mroonga/storage.optimization_order_limit_optimized_varchar_equal_with_index mroonga/storage.select_all mroonga/storage.optimization_order_limit_optimized_varchar_equal_without_index mroonga/storage.update_id_unique_hash_index mroonga/storage.optimization_order_limit_optimized_datetime_equal mroonga/storage.replace_geometry mroonga/storage.insert_on_duplicate_key_update_no_primary_key_and_unique_key_twice mroonga/storage.information_schema_tables_auto_increment_none mroonga/storage.index_read_multiple_varchar_collation mroonga/storage.optimization_order_limit_optimized_datetime_greater_than_or_equal mroonga/storage.optimization_order_limit_optimized_datetime_less_than_or_equal mroonga/storage.optimization_order_limit_optimized_time_less_than_or_equal mroonga/storage.variable_lock_timeout_no_retry mroonga/storage.index_update_single_column mroonga/storage.optimization_order_limit_optimized_year_greater_than_or_equal mroonga/storage.optimization_order_limit_optimized_year_less_than_or_equal

==7283== 24 bytes in 1 blocks are definitely lost in loss record 1 of 5

==7283==    at 0x4C267EE: malloc (vg_replace_malloc.c:299)

==7283==    by 0xC215628: ???

==7283==    by 0xC215B01: ???

==7283==    by 0xC215E33: ???

==7283==    by 0x7AA1EF: handler::ha_open(TABLE*, char const*, int, unsigned int) (handler.cc:2524)

==7283==    by 0x6B596D: open_table_from_share(THD*, TABLE_SHARE*, char const*, unsigned int, unsigned int, unsigned int, TABLE*, bool) (table.cc:2865)

==7283==    by 0x59BE9D: open_table(THD*, TABLE_LIST*, st_mem_root*, Open_table_context*) (sql_base.cc:2527)

==7283==    by 0x59C956: open_and_process_table(THD*, LEX*, TABLE_LIST*, unsigned int*, unsigned int, Prelocking_strategy*, bool, Open_table_context*, st_mem_root*) (sql_base.cc:4045)

==7283==    by 0x59CD09: open_tables(THD*, TABLE_LIST**, unsigned int*, unsigned int, Prelocking_strategy*) (sql_base.cc:4579)

==7283==    by 0x59D419: open_and_lock_tables(THD*, TABLE_LIST*, bool, unsigned int, Prelocking_strategy*) (sql_base.cc:5222)

==7283==    by 0x5E817A: open_and_lock_tables (sql_base.h:489)

==7283==    by 0x5E817A: execute_sqlcom_select(THD*, TABLE_LIST*) (sql_parse.cc:5238)

==7283==    by 0x5F017C: mysql_execute_command(THD*) (sql_parse.cc:2562)

==7283==    by 0x5F2BD9: mysql_parse(THD*, char*, unsigned int, Parser_state*) (sql_parse.cc:6574)

==7283==    by 0x5F4E34: dispatch_command(enum_server_command, THD*, char*, unsigned int) (sql_parse.cc:1308)

==7283==    by 0x5F5A5A: do_command(THD*) (sql_parse.cc:998)

==7283==    by 0x6E7A5E: do_handle_one_connection(THD*) (sql_connect.cc:1378)

==7283== 24 bytes in 1 blocks are definitely lost in loss record 2 of 5

==7283==    at 0x4C267EE: malloc (vg_replace_malloc.c:299)

==7283==    by 0xC215637: ???

==7283==    by 0xC215B01: ???

==7283==    by 0xC215E33: ???

==7283==    by 0x7AA1EF: handler::ha_open(TABLE*, char const*, int, unsigned int) (handler.cc:2524)

==7283==    by 0x6B596D: open_table_from_share(THD*, TABLE_SHARE*, char const*, unsigned int, unsigned int, unsigned int, TABLE*, bool) (table.cc:2865)

==7283==    by 0x59BE9D: open_table(THD*, TABLE_LIST*, st_mem_root*, Open_table_context*) (sql_base.cc:2527)

==7283==    by 0x59C956: open_and_process_table(THD*, LEX*, TABLE_LIST*, unsigned int*, unsigned int, Prelocking_strategy*, bool, Open_table_context*, st_mem_root*) (sql_base.cc:4045)

==7283==    by 0x59CD09: open_tables(THD*, TABLE_LIST**, unsigned int*, unsigned int, Prelocking_strategy*) (sql_base.cc:4579)

==7283==    by 0x59D419: open_and_lock_tables(THD*, TABLE_LIST*, bool, unsigned int, Prelocking_strategy*) (sql_base.cc:5222)

==7283==    by 0x5E817A: open_and_lock_tables (sql_base.h:489)

==7283==    by 0x5E817A: execute_sqlcom_select(THD*, TABLE_LIST*) (sql_parse.cc:5238)

==7283==    by 0x5F017C: mysql_execute_command(THD*) (sql_parse.cc:2562)

==7283==    by 0x5F2BD9: mysql_parse(THD*, char*, unsigned int, Parser_state*) (sql_parse.cc:6574)

==7283==    by 0x5F4E34: dispatch_command(enum_server_command, THD*, char*, unsigned int) (sql_parse.cc:1308)

==7283==    by 0x5F5A5A: do_command(THD*) (sql_parse.cc:998)

==7283==    by 0x6E7A5E: do_handle_one_connection(THD*) (sql_connect.cc:1378)