[WFLY-2083] Upgrade to HornetQ 2.4.0.Beta2

With 2.4.0.Beta2, HornetQ loads its supported protocols (other than its
CORE protocol) using a ServiceLoader.
STOMP and AMQP protocols implementation have been moved to their own
artificats.

Add modules org.hornetq.protocol.stomp & org.hornet.protocol.amqp.
Import them by default in org.hornetq module dependencies.

To disable a protocol, remove it from the org.hornetq module
dependencies.