Merge of feature/improve-parameters breaks tests

After the merge of 5c1c0524, at least one test (test_ff_stokes_channel_3d) fails because the output file changed its name from

test_ff_stokes_channel_3d-00001.vtu to test_stokes_channel_3d-00001.vtu

CMakeLists.txt explicitly states

-Problem.Name test_ff_stokes_channel_3d

but somehow this is ignored and the name given in parmas.input is used.