add attribute 'test' in dict 'data' (#264)

* add attribute 'test' in dict 'data'

* Update lenet5_mnist.py

 delete spaces around '='.

* init

* Delete custom directory

configs/lenet/lenet5_mnist.py

@@ -29,6 +29,8 @@ data = dict(
     train=dict(
         type=dataset_type, data_prefix='data/mnist', pipeline=train_pipeline),
     val=dict(
+        type=dataset_type, data_prefix='data/mnist', pipeline=test_pipeline),
+    test=dict(
         type=dataset_type, data_prefix='data/mnist', pipeline=test_pipeline))
 evaluation = dict(
     interval=5, metric='accuracy', metric_options={'topk': (1, )})