adapted tutorial such that we have advection-dominated flow again

git-svn-id: svn://svn.iws.uni-stuttgart.de/DUMUX/dumux/trunk@4807 2fb0f335-1f38-0410-981e-8018bf24f1b0

tutorial/tutorialproblem_decoupled.hh

@@ -184,7 +184,7 @@ public:
     bool shouldWriteOutput() const /*@\label{tutorial-decoupled:output}@*/
     {
         return this->timeManager().timeStepIndex() > 0 &&
-        (this->timeManager().timeStepIndex() % 20 == 0);
+        (this->timeManager().timeStepIndex() % 1 == 0);
     }
 
     //! Returns the temperature within the domain.