Experiment test cases have reference to user path

[shuttle1987]

persephone/persephone/tests/experiments/test_na.py

Lines 260 to 273 in aa69575

	@pytest.mark.experiment
	def test_reuse_model(preprocess_na):
	tgt_dir = Path(config.TEST_DATA_PATH) / "na"
	na_corpus = na.Corpus("fbank_and_pitch", "phonemes_and_tones",
	tgt_dir=tgt_dir)
	na_reader = corpus_reader.CorpusReader(na_corpus)
	logging.info("na_corpus {}".format(na_corpus))
	logging.info("na_corpus.get_untranscribed_fns():")
	logging.info(pprint.pformat(na_corpus.get_untranscribed_fns()))
	# TODO Currently assumes we're on slug. Need to package up the model and
	# put it on cloudstor, then create a fixture to download it.
	exp_dir = prep_exp_dir(directory=config.TEST_EXP_PATH)
	model = rnn_ctc.Model(exp_dir, na_reader, num_layers=3, hidden_size=400)
	model.transcribe(restore_model_path="/home/oadams/code/mam/exp/252/model/model_best.ckpt")

This test depends on being able to locate a Tensorflow checkpoint file in a local directory. This will fail for other users.

Same with:

persephone/persephone/tests/experiments/test_na.py

Lines 275 to 282 in aa69575

	@pytest.mark.experiment
	def test_load_saver():
	tgt_dir = Path(config.TEST_DATA_PATH) / "na"
	na_corpus = na.Corpus("fbank_and_pitch", "phonemes_and_tones",
	tgt_dir=tgt_dir)
	na_reader = corpus_reader.CorpusReader(na_corpus)
	model_prefix_path = "/home/oadams/code/mam/exp/252/model/model_best.ckpt"
	saver = tf.train.Saver()

And

persephone/persephone/tests/experiments/test_na.py

Lines 284 to 292 in aa69575

	@pytest.mark.experiment
	def test_load_meta():
	tgt_dir = Path(config.TEST_DATA_PATH) / "na"
	na_corpus = na.Corpus("fbank_and_pitch", "phonemes_and_tones",
	tgt_dir=tgt_dir)
	na_reader = corpus_reader.CorpusReader(na_corpus)
	tf.reset_default_graph()
	model_prefix_path = "/home/oadams/code/mam/exp/252/model/model_best.ckpt"

[shuttle1987]

Creating a minimal test corpus as per #166 will make this far less of a big deal.