message: Fix test failure
  filename_to_dataset should be changed to lambda filename: reader(filename, *reader_args),
  (copy-past-error)
diff: @@ -886,10 +886,10 @@ def make_batched_features_dataset_v2(file_pattern,
  # Read files sequentially (if reader_num_threads=1) or in parallel
  dataset = core_readers.ParallelInterleaveDataset(
  dataset,
  - filename_to_dataset,
  - cycle_length=num_parallel_reads,
  + lambda filename: reader(filename, *reader_args),
  + cycle_length=reader_num_threads,
  block_length=1,
  - sloppy=sloppy,
  + sloppy=sloppy_ordering,
  buffer_output_elements=None,
  prefetch_input_elements=None)
  