Call tm.rollback() when handling Status.ROLLING_BACK in CMTTxInterceptor.endTransaction() to correctly remove transaction from _transaction map

Issue

We are seeing an issue as discussed and commented on at https://developer.jboss.org/message/950898#950898

Status.STATUS_COMMITTING:
Status.STATUS_COMMITTED:
Status.STATUS_PREPARED:
Status.STATUS_PREPARING:

Commit is called in parallel and the transaction is trying to commit so try to commit too: call tm.commit

TimerCMTTxInterceptor/LifecycleCMTTxInterceptor are using CMTTxInterceptor.endTransaction(), so they shouldn't need changes.

Status.STATUS_ROLLING_BACK can happen if the reaper has started to rollback the transaction

This is addressed upstream via https://issues.jboss.org/browse/WFLY-6214 and needs to be backported to EAP 6