fix decoupled 1p problem such that it would take a problem parameter from the...

fix decoupled 1p problem such that it would take a problem parameter from the input file. Comment the setting of the parameter

git-svn-id: svn://svn.iws.uni-stuttgart.de/DUMUX/dumux/trunk@11783 2fb0f335-1f38-0410-981e-8018bf24f1b0