Fix/damping

@patrick.jaap_at_tu-dresden.de : Can you merge the changes w.r.t. the damping parameter into the commit: Cleanup of the TrustRegionSolver class (16374b9e)?

dune/elasticity/common/trustregionsolver.cc

@@ -39,7 +39,8 @@ setup(const typename BasisType::GridView::Grid& grid,
          int nu1,
          int nu2,
          int baseIterations,
-         double baseTolerance)
+         double baseTolerance,
+         double damping)
 
 {
     grid_                     = &grid;
@@ -53,6 +54,7 @@ setup(const typename BasisType::GridView::Grid& grid,
     ignoreNodes_              = std::make_shared<Dune::BitSetVector<blocksize>>(dirichletNodes);
     baseIterations_           = baseIterations;
     baseTolerance_            = baseTolerance;
+    damping_                  = damping;
 
     int numLevels = grid_->maxLevel()+1;