AXIOM-426:
* Fixed StAX dialect detection on JBoss AS 7.1.
* Added an Arquillian based test case that validates this on JBoss AS 7.1.1.


git-svn-id: https://svn.apache.org/repos/asf/webservices/commons/trunk/modules/axiom@1430009 13f79535-47bb-0310-9956-ffa450edef68