[AS7-6836] JMS access over HTTP

*Do not merge before Undertow 1.0.0.Alpha8 is integrated (that contains the [fix](https://github.com/undertow-io/undertow/commit/a52a4d09b26243b09526bd04407ef695c6f6e7b8)) to make the testJMSOverHTTPWithServlet test pass.*

* bump messaging subsystem XML schema to urn:jboss:domain:messaging:1.4
* bump messaging management version to 1.3.0
* add servlet-connector resource to hornetq-server to define a connector
  that will connect to the HornetQ server over HTTP by tunneling through
  a Servlet
* add to the messaging subsystem XML config a servlet-connector and a
  JMS ConnectionFactory that uses it.
* add an optional dependency to the org.jboss.as.web-common module to be able
  to deploy the servlet from the org.jboss.as.messaging module
* add test JMSClientTestCase#testJMSOverHTTPWithServlet()