Fix accidental inclusion of cudnn tests in CPU tests
Fix accidental inclusion of cudnn tests in CPU tests

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