information schema - errors populating fail to free memory, unlock mutexes

Given the OK macro used in innodb does a DBUG_RETURN(1) on expression failure the innodb implementation has a number of errors in i_s.cc

In the case of the OK expression failing:

1. i_s_innodb_buf_page_lru_fill - heap isn't freed
2. i_s_innodb_buffer_page_fill - deepest index loop - dict_sys->mutex isn't unlocked
3. i_s_fts_config_fill - fails to close table, unlock dict_operation_lock and possibly clean up trx
4. i_s_fts_index_cache_fill_one_index fails to free conv_str.f_str
5. i_s_fts_deleted_generic_fill fails to free deleted, close table, unlock dict_operation_lock and possibly clean up trx

sync/sync0arr.cc appears safe in its OK usage (from 10.1 onwards)

In addition to the requirement for this fix, perhaps something like
(10.2)

diff --git a/storage/innobase/handler/i_s.h b/storage/innobase/handler/i_s.h

index 8d34fbf..8e455c4 100644

--- a/storage/innobase/handler/i_s.h

+++ b/storage/innobase/handler/i_s.h

@@ -70,6 +70,8 @@ extern struct st_maria_plugin i_s_innodb_sys_semaphore_waits;

 #define OK(expr)               \

        if ((expr) != 0) {      \

+               ib::error() << "Error populating innodb information schema with " \

+                           << #expr; \

                DBUG_RETURN(1); \

        }

10.0,10.2 are still using fprintf(stderr.