message: Reenable LSTM test which were disabled because of flaky.
diff: @@ -351,7 +351,7 @@ class LSTMV2Test(keras_parameterized.TestCase):
  self.assertAllClose(y_2, y_4, rtol=1e-5, atol=2e-5)
  @parameterized.named_parameters(('v0', 0), ('v1', 1), ('v2', 2))
  - def DISABLED_test_implementation_mode_LSTM(self, implementation_mode):
  + def test_implementation_mode_LSTM(self, implementation_mode):
  num_samples = 2
  timesteps = 3
  embedding_dim = 4
  @@ -552,7 +552,7 @@ class LSTMV2Test(keras_parameterized.TestCase):
  self.assertAllClose(y_1, y_2)
  self.assertAllClose(y_2, y_3)
  - def DISABLED_test_return_sequences_LSTM(self):
  + def test_return_sequences_LSTM(self):
  num_samples = 2
  timesteps = 3
  embedding_dim = 4
  