unbreak test_seq2seq_caffe2_model_cnn_one_stack_encoder
unbreak test_seq2seq_caffe2_model_cnn_one_stack_encoder

Summary: Fixes unit test test_seq2seq_caffe2_model_cnn_one_stack_encoder, broken by D4905003. (Also some commas.)

Differential Revision: D4920699

fbshipit-source-id: 2fe501095e3e26a475d666afcae8e48c953f2eef

xzturn/caffe2,davinwang/caffe2,sf-wind/caffe2,pietern/caffe2,pietern/caffe2,Yangqing/caffe2,bwasti/caffe2,bwasti/caffe2,pietern/caffe2,caffe2/caffe2,Yangqing/caffe2,xzturn/caffe2,sf-wind/caffe2,xzturn/caffe2,davinwang/caffe2,bwasti/caffe2,bwasti/caffe2,bwasti/caffe2,davinwang/caffe2,pietern/caffe2,xzturn/caffe2,sf-wind/caffe2,Yangqing/caffe2,davinwang/caffe2,pietern/caffe2,Yangqing/caffe2,Yangqing/caffe2,davinwang/caffe2,xzturn/caffe2,sf-wind/caffe2,sf-wind/caffe2