adding tests for numpy reader and spatial filler

Author: jindrahelcl

neuralmonkey/encoders/numpy_stateful_filler.py

@@ -164,5 +164,5 @@ def spatial_mask(self) -> tf.Tensor:
 
     def feed_dict(self, dataset: Dataset, train: bool = False) -> FeedDict:
         fd = ModelPart.feed_dict(self, dataset, train)
-        fd[self.spatial_input] = dataset.get_series(self.data_id)
+        fd[self.spatial_input] = list(dataset.get_series(self.data_id))
         return fd