[WLFY-509] JMS 2.0 API support

* update maven GAV for JMS API to:

  org.jboss.spec.javax.jms:jboss-jms-api_2.0_spec:1.0.0.Alpha1-SNAPSHOT

* exclude the JMS 1.1 spec artifact from
  org.jboss.ws.cxf:jbossws-cxf-server dependencies

* exclude temporarily the JMS 1.1 spec artifact from
  org.hornetq:hornetq-jms-server and org.hornetq:hornetq-jms-client
  depedencies until HornetQ supports JMS 2.0

---

JMS 2.0 support has been split into several issues, all linked from [WFLY-509](https://issues.jboss.org/browse/WFLY-509)

This PR makes available the JMS 2.0 API so that we can work on these issues in parallel