message: Fix warning in sparse_ops.py caused by array_ops.where
diff: @@ -142,7 +142,7 @@ def sparse_expand_dims(sp_input, axis=None, name=None):
  " - 1, rank(sp_input)]")
  # Convert axis to a positive value if it is negative.
  - axis = array_ops.where(axis >= 0, axis, axis + rank + 1)
  + axis = array_ops.where_v2(axis >= 0, axis, axis + rank + 1)
  # Create the new column of indices for the sparse tensor by slicing
  # the indices and inserting a new column of indices for the new dimension.
  @@ -1727,7 +1727,7 @@ def sparse_retain(sp_input, to_retain):
  sp_input.values.get_shape().dims[0].merge_with(
  tensor_shape.dimension_at_index(retain_shape, 0))
  - where_true = array_ops.reshape(array_ops.where(to_retain), [-1])
  + where_true = array_ops.reshape(array_ops.where_v2(to_retain), [-1])
  new_indices = array_ops.gather(sp_input.indices, where_true)
  new_values = array_ops.gather(sp_input.values, where_true)
  return sparse_tensor.SparseTensor(new_indices, new_values,
  