BlackoilWellModel: move forceShutWellByNameIfPredictionMode to generic class

opm/simulators/wells/BlackoilWellModelGeneric.hpp

@@ -141,6 +141,11 @@ public:
     /// Return true if any well has a THP constraint.
     bool hasTHPConstraints() const;
 
+    /// Shut down any single well, but only if it is in prediction mode.
+    /// Returns true if the well was actually found and shut.
+    bool forceShutWellByNameIfPredictionMode(const std::string& wellname,
+                                             const double simulation_time);
+
 protected:
     GroupState& groupState() { return this->active_wgstate_.group_state; }