Base setting with stochastic discrete model.

def rlmb_base_stochastic_discrete_noresize():
  """Base setting with stochastic discrete model."""
  hparams = rlmb_base()
  hparams.generative_model = "next_frame_basic_stochastic_discrete"
  hparams.generative_model_params = "next_frame_basic_stochastic_discrete"
  hparams.resize_height_factor = 1
  hparams.resize_width_factor = 1
  return hparams