[WFCORE-229] Do not provide ops registered with ProxyControllerRegistrat...

...ion when the targeted address is a child address

The problem here is any call for a handler in an AbstractResourceRegistration ends up calling  AbstractResourceRegistration.getRootInvocation(). That builds a RootInvocation based on the address of the proxy registration, not of the virtual child. The result is the elements of the address below the proxy registration are lost and the lookup of the OperationEntry ends up thinking the request is for the proxy reg address, not a child, and returns handlers registered for the root address.