message: Pass scope variable to group_norm
  Summary: At present, scope variable is unused in group_norm, while it is passed to layer_norm and instance_norm.
  Reviewers: davidn, georgep
diff: @@ -247,7 +247,7 @@ def group_norm(inputs,
  """
  return _group_norm_impl(inputs, groups, channels_axis, reduction_axes,
  center, scale, epsilon, param_initializers, reuse,
  - variables_collections, training, trainable,
  + variables_collections, training, trainable, scope,
  "GroupNorm")
  