CMake: It is not sufficient to provide the parameter file, since the tests are...

CMake: It is not sufficient to provide the parameter file, since the tests are started from the root build directory and the grids are not found. Therefore, also the gridfile names are provided. Copied references and parameters into corresponding folders.

git-svn-id: svn://svn.iws.uni-stuttgart.de/DUMUX/dumux/trunk@7681 2fb0f335-1f38-0410-981e-8018bf24f1b0