Set off-diagonal clover terms to be non-zero in clover invert test to…

… make clover verification non trivial

tests/invert_test.cpp

@@ -316,7 +316,7 @@ int main(int argc, char **argv)
   }
 
   if (dslash_type == QUDA_CLOVER_WILSON_DSLASH) {
-    double norm = 0.0; // clover components are random numbers in the range (-norm, norm)
+    double norm = 0.2; // clover components are random numbers in the range (-norm, norm)
     double diag = 1.0; // constant added to the diagonal
 
     size_t cSize = (inv_param.clover_cpu_prec == QUDA_DOUBLE_PRECISION) ? sizeof(double) : sizeof(float);