adding FLD to the ControlEnum of GroupProduction

opm/parser/eclipse/EclipseState/Schedule/ScheduleEnums.cpp

@@ -185,6 +185,8 @@ namespace Opm {
                 return "RESV";
             case PRBL:
                 return "PRBL";
+            case FLD:
+                return "FLD";
             default:
                 throw std::invalid_argument("Unhandled enum value");
             }
@@ -208,6 +210,8 @@ namespace Opm {
                 return RESV;
             else if (stringValue == "PRBL")
                 return PRBL;
+            else if (stringValue == "FLD")
+                return FLD;
             else
                 throw std::invalid_argument("Unknown enum state string: " + stringValue );
         }

opm/parser/eclipse/EclipseState/Schedule/ScheduleEnums.hpp

@@ -190,7 +190,8 @@ namespace Opm {
             LRAT = 4,
             CRAT = 5,
             RESV = 6,
-            PRBL = 7
+            PRBL = 7,
+            FLD  = 8
         };
 
         const std::string ControlEnum2String( GroupProduction::ControlEnum enumValue );