Created by: jczaja

Some operators like LRN are having is_test attribute which indicates if grad op will be executed and also are producing few Output tensors eg. actual output and some Tensors for communication with grad op (MidOout for LRN). For is_test == True MidOut tensor is not needed and its removal could bring some memory savings & faster execution of MKL-DNN Unit tests.

As a result inference on mkl-dnn models should consume less memory for LRN & pooling ops.