[multidomain] added eddy viscosity, diffusivity and conductivity to

couplinglocalresiduals. this is done in consistency with the freeflow
stokes models. the eddy coefficient are zero for the stokes case.

approved by gruenich


git-svn-id: svn://svn.iws.uni-stuttgart.de/DUMUX/dumux/trunk@12738 2fb0f335-1f38-0410-981e-8018bf24f1b0