add is_dnn attribute to gemm tests

theano/gpuarray/tests/test_gemmcorr.py

@@ -228,3 +228,4 @@ class TestGroupGpuCorr2d(Grouped_conv_noOptim):
     conv2d_gradw = staticmethod(GpuCorrMM_gradWeights)
     conv2d_gradi = staticmethod(GpuCorrMM_gradInputs)
     flip_filter = True
+    is_dnn = False

theano/tensor/nnet/tests/test_corr.py

@@ -426,6 +426,7 @@ class TestGroupCorr2d(Grouped_conv_noOptim):
     conv2d_gradw = staticmethod(corr.CorrMM_gradWeights)
     conv2d_gradi = staticmethod(corr.CorrMM_gradInputs)
     flip_filter = True
+    is_dnn = False
 
     def test_graph(self):
         # define common values  first