[WFLY-3658] Upgrade to HornetQ 2.4.3.Final

* upgrade HornetQ to 2.4.3.Final
* modifiy SendMessagesTestCase since HornetQ RA will no longer interrupt
  the MDB when an undeployment is triggered

JIRA: https://issues.jboss.org/browse/WFLY-3658
Merge pull request #6549 from jmesnil/WFLY-3658_upgrade_hornetq_2.4.3.Final

[WFLY-3658] Upgrade to HornetQ 2.4.3.Final