This reverts commit 0b6a6aef.

- added test for getListTableColumnsSQL
- added test for getListTableForeignKeysSQL
- added test for getListTableIndexesSQL

Fixed a PHP warning in DBALException::driverExceptionDuringQuery() when a parameter contains binary data.

    Connection#insert(),  Connection#update() and Connection#delete(). Closes GH-271

DBAL-54 was fixed in commit 3d55dc8e by
changing SQL queries order. However it was later reintroduced.

This patch uses a different, more future-proof way, approach by using
DROP SEQUENCE ... CASCADE syntax, and thus does not depend on queries order.

fix :: operator in sql parser