removing BlackoilPhases and PhaseUsage

replacing it with a new PhaseUsageInfo and FluidSystem, both of which
are using the same implementation of PhaseUsageInfo, and only one set of
indices is used. Currently, it is the BlackOilDefaultFluidSystemIndices.

examples/printvfp.cpp

@@ -33,7 +33,8 @@
 #include <opm/simulators/wells/VFPProperties.hpp>
 #include <opm/simulators/wells/WellState.hpp>
 
-#include <opm/simulators/utils/phaseUsageFromDeck.hpp>
+#include <opm/material/fluidsystems/PhaseUsageInfo.hpp>
+#include <opm/material/fluidsystems/BlackOilDefaultFluidSystemIndices.hpp>
 
 #include <opm/input/eclipse/Units/Units.hpp>
 
@@ -55,6 +56,8 @@ namespace {
 
 struct Setup
 {
+    using IndexTraits = BlackOilDefaultFluidSystemIndices;
+    using PhaseUsage = PhaseUsageInfo<IndexTraits>;
     explicit Setup(const std::string& file)
         : Setup { Parser{}.parseFile(file) }
     {}
@@ -62,19 +65,19 @@ struct Setup
     explicit Setup(const Deck& deck)
         : ecl_state  { std::make_unique<EclipseState>(deck) }
         , schedule   { std::make_unique<Schedule>(deck, *ecl_state, std::make_shared<Python>()) }
-        , well_state { std::make_unique<WellState<double>>(phaseUsage(ecl_state->runspec().phases())) }
+        , well_state { std::make_unique<WellState<double, IndexTraits>>(PhaseUsage(ecl_state->runspec().phases())) }
     {
         const int step = 0;
         const auto& sched_state = (*this->schedule)[step];
 
-        this->vfp_properties = std::make_unique<VFPProperties<double>>
+        this->vfp_properties = std::make_unique<VFPProperties<double, IndexTraits>>
             (sched_state.vfpinj(), sched_state.vfpprod(), *well_state);
     }
 
     std::unique_ptr<EclipseState> ecl_state;
     std::unique_ptr<Schedule> schedule;
-    std::unique_ptr<WellState<double>> well_state;
-    std::unique_ptr<VFPProperties<double>> vfp_properties;
+    std::unique_ptr<WellState<double, IndexTraits>> well_state;
+    std::unique_ptr<VFPProperties<double, IndexTraits>> vfp_properties;
 };