MULE-6796: Allow MEL expressions in cxf:property of cxf:ws-config
_ WsConfig now will wrap the properties in a map that will evaluate the values based upon the current request context.
(cherry picked from commit f578cb0c1100f35064da6befa8707b64a56255ef)
(cherry picked from commit 32639ec86459a79858550788b3415056c09e8a8b)