support REIN for solvent

opm/simulators/wells/WellInterface.hpp

@@ -274,6 +274,9 @@ namespace Opm
             return wellIsStopped_;
         }
 
+        void setWsolvent(const double wsolvent);
+
+
     protected:
 
         // to indicate a invalid completion
@@ -373,6 +376,8 @@ namespace Opm
 
         bool wellIsStopped_;
 
+        double wsolvent_;
+
         const PhaseUsage& phaseUsage() const;
 
         int flowPhaseToEbosCompIdx( const int phaseIdx ) const;
@@ -473,6 +478,8 @@ namespace Opm
 
         bool checkConstraints(WellState& well_state, const SummaryState& summaryState);
 
+
+
     };