RFE#869: Run SQL query: Allow rollback for InnoDB tables.
Rollback support for other Transactional engines other than InnoDB.

Signed-off-by: Ashutosh Dhundhara <ashutoshdhundhara@yahoo.com>
Merge pull request #1242 from ashutoshdhundhara/rfe_869

RFE#869: Run SQL query: Allow rollback for InnoDB tables.