message: fix rpc_service.py
diff: @@ -34,11 +34,15 @@ class MultiLangServerServiceServicer(multi_lang_general_model_service_pb2_grpc.
  self._parse_model_config(self.model_config_path_list)
  def _init_bclient(self, model_config_path_list, endpoints, timeout_ms=None):
  + file_path_list = []
  + for single_model_config in model_config_path_list:
  + file_path_list.append("{}/serving_server_conf.prototxt".format(
  + single_model_config))
  from paddle_serving_client import Client
  self.bclient_ = Client()
  if timeout_ms is not None:
  self.bclient_.set_rpc_timeout_ms(timeout_ms)
  - self.bclient_.load_client_config(model_config_path_list)
  + self.bclient_.load_client_config(file_path_list)
  self.bclient_.connect(endpoints)
  def _parse_model_config(self, model_config_path_list):
  