[catalogue] Fixed #845 An RdbmsCatalogue iterator should return its underlying database connection when the last row has been fetched

cta-catalogue-schema-verify tool

Permanently removed the concept of rdbms::UnexpectedSemicolon.  The rdbms package should avoid trying to parse SQL, at least for now.

The folder containing the files need now to be removed

Please note that neither setAutcommitMode() and getAutcommitMode()
should be called for now.  This commit is preparing the future
interface of the code.

Fixed cta/CTA#364 RdbmsArchiveFileItorImpl constructor should NOT return database connection to pool

Moved autocommitMode parameter from Stmt constructor to Stmt::executeQuery() and Stmt::executeNonQuery()

Renamed rdbms::AutocommitMode::ON and rdbms::AutocommitMode::OFF to rdbms::AutocommitMode::AUTOCOMMIT_ON and rdbms::AutocommitMode::OFF respectively

Done