[cddlm] Testing parsing with the deployment API

[Steve Loughran]

I've been thinking about how to add a testing operation to the 
deployment API; a way to get at the fully parsed document.

How about we have the option of a new property in a new namespace 
(xmlns:diagnostics="...") :-

diagnostics:ParsedDescriptor

If implemented, this read only resource property would contain the 
entirety of the parsed document, set during the initialize() operation.

Implementations must list the qname for this in their 
ManagementCapabilities operation, plus, if they want to be OGSA-BPI 
compliant, in that thing that that spec asks for.

The nice thing about this approach is that as well as adding no new 
operations to the API, it lets anyone working with a deployment find out 
what it was that was actually instantiated. So it will benefit users as 
well as CDL implementors.

Oh, and it needs no extra WSDL, just some XSD work.

-steve