[multidomain][stokesdarcy] add harmonic mean for diffusion matrix maxwell...

[multidomain][stokesdarcy] add harmonic mean for diffusion matrix maxwell stefan for stokesdarcy couplingdata
Status Name Job ID Coverage
  Trigger
manual full-dune-latest-release-clang
manual full-dune-latest-release-gcc
manual full-dune-master-gcc
manual minimal-dune-latest-release-gcc
 
  Downstream Modules
created trigger lecture