add get_config test=develop

python/paddle_serving_client/__init__.py

@@ -396,7 +396,7 @@ class MultiLangClient(object):
         self._parse_model_config(proto_txt)
 
     def _load_client_config(self, stub):
-        req= pb2.ServingConfig()
+        req= pb2.EmptyRequest()
         self._config  = self.stub_.get_client_proto_text(req)
         self._parse_model_config(config.proto_txt)
 

python/paddle_serving_server/__init__.py

@@ -605,7 +605,7 @@ class MultiLangServer(object):
         p_bserver.start()
         server = grpc.server(
             futures.ThreadPoolExecutor(max_workers=self.worker_num_))
-        pb2_grpc.add_MultiLangGeneralModelServiceServicer_to_server(
+        grpc_pb2.add_MultiLangGeneralModelServiceServicer_to_server(
             MultiLangServerService(self.model_config_path_,
                                    ["0.0.0.0:{}".format(self.port_list_[0])]),
             server)