Fix maven warnings about overriding Netty's version.
HQ to require Java7.
jms2/java7: fix method override
HORNETQ-1209 Fix Message.receiveBody* implementations.
HORNETQ-1209 Implement Message.isBodyAssignableTo(Class) and getBody(Class)
[HORNETQ-1213] JMS 2.0 MDB activation properties

* add destinationLookup property to HornetQActivationSpec
  (backed by destination field + useJNDI set to true)
* add connectionFactoryLookup property to HornetQActivationSpec
  to look up the JMS ConnectionFactory from JNDI