jboss-client jar is missing HornetQ classes

HornetQ 2.3.0.BETA1's hornetq-core-client.jar is missing fundamental classes to run JMS code in an application client (e.g. HornetQBuffer) [HORNETQ-1053].

Until a version of HornetQ fixes that, we must add hornetq-commons jar to the AS7 client BOM to ensure the classes will be available to any JMS client