Update keras_util_test with explicit model name (#3620)
Update keras_util_test with explicit model name (#3620)

The name of the model will be soon changed when Keras team refactor the class structure between layer, network and model. The functional model will have new class name, which will cause this test to fail.

Changing the test model here with explicit name so that it's more stable.

tensorflow/tensorboard,tensorflow/tensorboard,tensorflow/tensorboard,tensorflow/tensorboard,tensorflow/tensorboard,tensorflow/tensorboard,tensorflow/tensorboard