[test] set pre/post smoother steps for kamg

dune/istl/paamg/test/kamgtest.cc

@@ -92,6 +92,9 @@ void testAMG(int N, int coarsenTarget, int ml)
   criterion.setBeta(1.0e-4);
   criterion.setMaxLevel(ml);
   criterion.setSkipIsolated(false);
+  // specify pre/post smoother steps
+  criterion.setNoPreSmoothSteps(1);
+  criterion.setNoPostSmoothSteps(1);
 
   Dune::SeqScalarProduct<Vector> sp;
   typedef Dune::Amg::KAMG<Operator,Vector,Smoother,Dune::Amg::SequentialInformation> AMG;