message: Mark grpc tests as integration tests
diff: @@ -22,6 +22,7 @@ def greeter_server():
  # pylint: disable=W0613,W0621
  +@pytest.mark.integration
  def test_greeter_server(greeter_server):
  with grpc.insecure_channel("localhost:50051") as channel:
  stub = hellonumproto_pb2_grpc.NumProtoServerStub(channel)
  