message: Add model_to_dot and print_summary to tf.keras.utils
  Fixes
diff: @@ -34,10 +34,12 @@ from tensorflow.python.keras.utils.generic_utils import serialize_keras_object
  from tensorflow.python.keras.utils.io_utils import HDF5Matrix
  from tensorflow.python.keras.utils.layer_utils import convert_all_kernels_in_model
  from tensorflow.python.keras.utils.layer_utils import get_source_inputs
  +from tensorflow.python.keras.utils.layer_utils import print_summary
  from tensorflow.python.keras.utils.losses_utils import squeeze_or_expand_dimensions
  from tensorflow.python.keras.utils.multi_gpu_utils import multi_gpu_model
  from tensorflow.python.keras.utils.np_utils import normalize
  from tensorflow.python.keras.utils.np_utils import to_categorical
  +from tensorflow.python.keras.utils.vis_utils import model_to_dot
  from tensorflow.python.keras.utils.vis_utils import plot_model
  del absolute_import
  