message: Always use a fresh graph in run_in_graph_and_eager_modes
diff: @@ -718,7 +718,7 @@ def run_in_graph_and_eager_modes(func=None,
  def decorated(self, **kwargs):
  try:
  - with context.graph_mode():
  + with ops.Graph().as_default():
  with self.test_session(use_gpu=use_gpu, config=config):
  f(self, **kwargs)
  except unittest.case.SkipTest:
  