[freeflow]

updated call of masstransfermodel class

[multidomain]
- if a boundarylayer model for mass transfer is used, now this also means a boundary layer
  model for energy transfer is used too (which is more consistent)
- added a test for the masstransfer and boundary layer models

reviewed by gruenich



git-svn-id: svn://svn.iws.uni-stuttgart.de/DUMUX/dumux/trunk@14757 2fb0f335-1f38-0410-981e-8018bf24f1b0