[WFLY-3045] : Expose JAXRS deployments via the management API

Displaying JAXRS resources in deployments, showing paths and  methods.
Adding mappings to the deployment infos of servlets.

Jira: https://issues.jboss.org/browse/WFLY-3045
Why the parent? I guess this answers the question in my last comment.

AFAIK, this structure of pushing everything to a parent is inconsistent with other subsystems, where runtime information is a child of the subdeployment resource.