@Override
  public void processArguments(String arguments) {
    enabled = true;
  }
QTest transactional directive handler

Enables transactional for the test.
Could also make it for other QOption-s.

Example:
--! qt:transactional
itests/util/src/main/java/org/apache/hadoop/hive/ql/qoption/QTestTransactional.java