use pardg odes and write Parameterfile later

dune/fem-dg/solver/rungekuttasolver.hh

@@ -139,7 +139,7 @@ public:
 
   };
 
-  static const bool useParDGSolvers = false ;
+  static const bool useParDGSolvers = true ;
   typedef OdeSolverSelection< OperatorType, DestinationType, useParDGSolvers >  OdeSolversType ;
 
   using BaseType :: solve; 

dune/fem-dg/stepper/baseevolution.hh

@@ -385,6 +385,11 @@ public:
         break ;
       }
 
+      if (tp.timeStep()<2)
+      {
+        // write parameters used (before simulation starts)
+        Dune::Fem::Parameter::write("parameter.log");
+      }
     } /****** END of time loop *****/
 
     // write last time step