fix  NS update error in Driver
Change-Id: I36f6722828423445cc20258aed775dc0fdab015e
Issue-ID: VFC-1185
Signed-off-by: maopengzhang <zhang.maopeng1@zte.com.cn>
(cherry picked from commit 
67fb6e372b7023f5cda39b4c8025488fa894cdef)
 
         response = self.client.post("/api/gvnfmdriver/v1/vnfmid/vnfs/2/operate",
                                     data=json.dumps(req_data), content_type="application/json")
         self.assertEqual(status.HTTP_202_ACCEPTED, response.status_code)
-        self.assertEqual(None, response.data)
         self.assertEqual("/vnf_lc_ops/NF-OPERATE-12-2a3be946-b01d-11e8-9302-08002705b121", response['Location'])
 
 # Heal API
 
                 return Response(data=resp, status=status.HTTP_404_NOT_FOUND)
             elif ret == status.HTTP_409_CONFLICT:
                 return Response(data=resp, status=status.HTTP_409_CONFLICT)
-            response = Response(data=None, status=status.HTTP_202_ACCEPTED)
+            response = Response(data=resp, status=status.HTTP_202_ACCEPTED)
             response["Location"] = location
             return response
         except GvnfmDriverException as e: