[messaging] transformer tests

* fix messaging transformers for EAP 6.2.0
* add transformers tests for WildFly 8.1.0.Final and EAP 6.3.0
Merge pull request #6589 from jmesnil/messaging_transformers_wildfly_8.1.0.Final_eap_6.3.0

Messaging transformers wildfly 8.1.0.final eap 6.3.0