support dropping extents in addition to partitions

CalShowPartitions is not working properly to show partitions

{{MariaDB [lkqd_stats]> select theDate,count(theDate) from lkqd_daily group by 1 order by 1;
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2 rows in set (1.02 sec)

MariaDB [lkqd_stats]> select calShowPartitionsByValue('lkqd_daily','theDate','2017-04-13','2017-04-13');
ERROR 1815 (HY000): Internal error: IDB-2040: No partition found for the given value range.
MariaDB [lkqd_stats]> select calShowPartitionsByValue('lkqd_daily','theDate','2017-04-14','2017-04-14');
ERROR 1815 (HY000): Internal error: IDB-2040: No partition found for the given value range.
MariaDB [lkqd_stats]> select calShowPartitions('lkqd_daily','theDate');
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1 row in set (0.00 sec)}}