message: Make verbosity controllable for `training_arrays` as well.
diff: @@ -408,7 +408,7 @@ def model_iteration(model,
  batch_size=batch_size,
  steps_per_epoch=validation_steps,
  callbacks=callbacks,
  - verbose=0,
  + verbose=verbose,
  mode=ModeKeys.TEST,
  validation_in_fit=True,
  prepared_feed_values_from_dataset=(val_iterator is not None),
  