The request id in server interceptors should NOT the
          same as the GIOP request id. The ORB may be servicing several
          connections, each with possibly overlapping sets of request ids.
          Therefore we need to create a request id specific to interceptors.
        
          NOTE: The requestId in client interceptors is the same as the
          GIOP request id. This works because both interceptors and
          request ids are scoped by the ORB on the client side.