This commit is related to FS#221 concerning freezes during parallel computations.

The error occurs in the compositional multi-phase models 2p2c, 3p3c and co2 during the update of the static data
- The problem has been fixed for the three models
- Additionally another check in the implicitmodel.hh update() function was added to make sure that no process converges if all the other processes have not converged as well.
Reviewed by Bernd.

git-svn-id: svn://svn.iws.uni-stuttgart.de/DUMUX/dumux/trunk@14431 2fb0f335-1f38-0410-981e-8018bf24f1b0