Test all fluidsystems
Not all fluidsystems are tested in test_fluidsystems.cc, e.g. brineco2.hh is included but not tested. It should be tested and the others should be checked.
There are two TODOs concerning the test of fluid states:
- TwoPTwoCFluidState TODO: doesn't fulfill interface!
- NonEquilibriumEnergyFluidState TODO: fails the test
Should the solidsystems also be tested?