Camel-cxf in PAYLOAD mode

[William Tam]

We discussed in this mailing list that the camel-cxf component (in 
particularly, the PAYLOAD mode implementation) was unnecessarily 
complicated.  Here is a quick update.  Using Dispatch APIs is probably 
still a long term goal.  As fixing the defect 
https://issues.apache.org/activemq/browse/CAMEL-2614, I am proposing to 
leverage CXF's SourceDataBinding to facilitate un/marshaling of 
parameters into XML payload.  As a result, we can get rid of the 
existing interceptors in camel-cxf which do some of the XML parsing.  I 
think more importantly, we remove a hurdle to inherit CXF WS-* supports 
in PAYLOAD.   Please see the patch in the CAMEL-2614 and let me know 
your feedbacks.

Thanks,
William