Print Parameter list at the very end of the programme if a parameter

exception is caught. 

The parameter list was printed every time a parameter exception was
thrown in the parameter class. This made it impossible to catch
parameter exceptions without having a paramter list output every time.
Now it is printed only if the start function exits with a parameter
error.



git-svn-id: svn://svn.iws.uni-stuttgart.de/DUMUX/dumux/trunk@15229 2fb0f335-1f38-0410-981e-8018bf24f1b0

dumux/common/parameters.hh

@@ -442,7 +442,6 @@ private:
 
         // retrieve actual parameter from the parameter tree
         if (!Params::tree().hasKey(canonicalName) && !Params::tree().hasKey(paramName)) {
-            print<TypeTag>();
             DUNE_THROW(::Dumux::ParameterException,
                        "Mandatory parameter '" << canonicalName
                        << "' was not specified");

dumux/common/start.hh

@@ -498,6 +498,7 @@ int start(int argc,
         return start_<TypeTag>(argc, argv, usage);
     }
     catch (Dumux::ParameterException &e) {
+        Dumux::Parameters::print<TypeTag>();
         std::cerr << e << ". Abort!\n";
         return 1;
     }