-seperated updateMaterial at the end of time step with that done after grid adaptation by introducing distinguishing bool. Compositional problem base class does that distinction.
Reviewd by Markus

git-svn-id: svn://svn.iws.uni-stuttgart.de/DUMUX/dumux/trunk@8404 2fb0f335-1f38-0410-981e-8018bf24f1b0