[bugfix] Removed bogus typename usage outside of template.

There was a typename used outside of template which caused
failed compilation of twolevelmethodest (at least for gcc-4.4).
This patch removes the bogus typename.

dune/istl/paamg/test/twolevelmethodtest.cc

@@ -33,7 +33,7 @@ typedef Dune::BlockVector<VectorBlock> Vector;
 typedef Dune::MatrixAdapter<BCRSMat,Vector,Vector> Operator;
 typedef Dune::CollectiveCommunication<void*> Comm;
 typedef Dune::SeqSSOR<BCRSMat,Vector,Vector> Smoother;
-typedef typename Dune::Amg::SmootherTraits<Smoother>::Arguments SmootherArgs;
+typedef Dune::Amg::SmootherTraits<Smoother>::Arguments SmootherArgs;
 #ifndef USE_OVERLAPPINGSCHWARZ
 typedef Dune::SeqSSOR<BCRSMat,Vector,Vector> FSmoother;
 #else