Fixed bug in MysqlStmt::do_bind_results() where bind[i].is_unsigned was not being set to true for uint64_t

This reverts commit 7a540cdc.

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

PostgresCatalogue::beginCreateTemporarySetDeferred() now calls conn.executeNonQueries() instead of conn.executeNonQuery()

This reverts commit e71ba128.