Add test_lstm

bob/learn/tensorflow/test/test_lstm.py

+#!/usr/bin/env python
+
+import numpy
+from bob.learn.tensorflow.datashuffler import Memory, ScaleFactor
+from bob.learn.tensorflow.network import MLP, Embedding
+from bob.learn.tensorflow.loss import BaseLoss
+from bob.learn.tensorflow.trainers import Trainer, constant
+from bob.learn.tensorflow.utils import load_mnist
+import tensorflow as tf
+
+train_data, train_labels, validation_data, validation_labels = load_mnist(data_dir="mnist")