message: Fix nightly test failures.
  Default value of "allow_pickle" is changed to "False" in NumPy 1.16.3 so we are seeing the following error with latest version of Numpy:
  ValueError: Object arrays cannot be loaded when allow_pickle=False
diff: @@ -613,7 +613,7 @@ class FileIoTest(test.TestCase):
  filename = os.path.join(self._base_dir, "a.npz")
  np.savez_compressed(filename, {"a": 1, "b": 2})
  with gfile.GFile(filename, "rb") as f:
  - info = np.load(f)
  + info = np.load(f, allow_pickle=True)
  _ = [i for i in info.items()]
  