-use vtk output level instead of debug level to trigger output verbosity (and introduce function in base problem as is done for output in general, approved by Markus)
-purge adaptive properties from 2p2c, as adaptive 2p2c modules will use their own properties files.

git-svn-id: svn://svn.iws.uni-stuttgart.de/DUMUX/dumux/trunk@9108 2fb0f335-1f38-0410-981e-8018bf24f1b0