JBoss EAP7 has strict backward compatibilities requirements; in order for not undermining future chances of including RESTEasy 3.1 into EAP 7 stream, we should restore old classes removed in https://github.com/resteasy/Resteasy/pull/874 (RESTEASY-1363) and move them into a separate deprecated module, which would be somehow disabled by default on WildFly.