message: Fix embedding_lookup_sparse_v2 calling into itself.
diff: @@ -558,7 +558,7 @@ def embedding_lookup_sparse_v2(params,
  combiner=None,
  max_norm=None,
  name=None):
  - return embedding_lookup_sparse_v2(
  + return embedding_lookup_sparse(
  params, sp_ids, sp_weights, partition_strategy, name, combiner, max_norm)
  