OracleSchemaMigrationIT#shouldNotEmitDdlEventsForNonTableObjects fails for Xstream

The integration test fails with a parsing exception of extraneous "END;" detected. In addition, the method explicitly looks for what appears to be the LogMiner log text strings, and once it times out only checks for the Xstream equivalent. This can be improved by resolving which text to check for first and then simply doing the check once, avoiding the excessive wait time for Xstream.