unwrapping proxies

[Benson Margulies]

The code in CXF-1355 that I'm cleaning up uses Spring's AopUtils to dig a
class out from under proxies. Of course, that class comes in spring-aop, and
I have to require that. Do we have some code of our own that does the same
thing? I seem to remember some jiras that would have called for such a
thing.