Used when this WebServiceContainer is servicing a POJO implementing the
ServiceLifecycle interface, in which case the WebServiceContainer is expected
to put the JAX-RPC MessageContext it creates in the Request instance.
Used when this WebServiceContainer is servicing a POJO, in which case
the pojo instance is held by the enclosing servlet/invoker and passed in
the Request instance to the container.
Delegates requests to a WebServiceContainer which is presumably for a POJO WebService
Nothing stopping us from using this for EJBs or other types of webservices other than
it is more than we need.