use BlackOilFluidState from opm-material

this has recently been moved there. Since redundancy is considered to
be bad, switch eWoms to it.

I've tested this with Norne: No measureable difference, as expected.

tests/test_blackoilfluidstate.cc

@@ -1,54 +0,0 @@
-// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
-// vi: set et ts=4 sw=4 sts=4:
-/*
-  This file is part of the Open Porous Media project (OPM).
-
-  OPM is free software: you can redistribute it and/or modify
-  it under the terms of the GNU General Public License as published by
-  the Free Software Foundation, either version 2 of the License, or
-  (at your option) any later version.
-
-  OPM is distributed in the hope that it will be useful,
-  but WITHOUT ANY WARRANTY; without even the implied warranty of
-  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-  GNU General Public License for more details.
-
-  You should have received a copy of the GNU General Public License
-  along with OPM.  If not, see <http://www.gnu.org/licenses/>.
-
-  Consult the COPYING file in the top-level source directory of this
-  module for the precise wording of the license and the list of
-  copyright holders.
-*/
-/*!
- * \file
- *
- * \brief This test ensures that the API of the black-oil fluid state conforms to the
- *        fluid state specification
- */
-#include "config.h"
-
-#include <opm/material/densead/Evaluation.hpp>
-#include <opm/material/densead/Math.hpp>
-#include <opm/material/checkFluidSystem.hpp>
-
-#include <ewoms/models/blackoil/blackoilmodel.hh>
-#include <ewoms/models/blackoil/blackoilfluidstate.hh>
-
-#include <opm/common/utility/platform_dependent/disable_warnings.h>
-#include <dune/common/parallel/mpihelper.hh>
-#include <opm/common/utility/platform_dependent/reenable_warnings.h>
-
-int main(int argc, char **argv)
-{
-    typedef TTAG(BlackOilModel) TypeTag;
-    typedef typename GET_PROP_TYPE(TypeTag, Evaluation) Evaluation;
-    typedef Ewoms::BlackOilFluidState<TypeTag> FluidState;
-
-    Dune::MPIHelper::instance(argc, argv);
-
-    FluidState fs;
-    checkFluidState<Evaluation>(fs);
-
-    return 0;
-}