I see this in EJBArchiveMetaDataAdapterEJB3.buildEnterpriseBeansMetaData(...) :

...
while (it.hasNext())
{
WebServiceDeclaration container = it.next();

// TODO: Add PortComponent parsing to EJBDescriptorHandler
PortComponentSpec pcMetaData = container.getAnnotation(PortComponentSpec.class);
MessageDriven mdbMetaData = container.getAnnotation(MessageDriven.class);

EJBMetaData ejbMetaData = null;
...

It seems to me the portComponent specified in jboss.xml (and available in the JBossEnterpriseBeanMetaData instance) is not read; this may result in the wrong endpoint address being set, which is the cause of this tck5 failure:
http://hudson.qa.jboss.com/hudson/view/TCK5/job/tck5-webservices12/204/testReport/unknownTestSuite.0/packageTests/com.sun.ts.tests.webservices12.ejb.annotations.WSEjbWebServiceRefTest2/