multiValveEngineState: Do not execute at start as the clearance is not available

Resolves bug-report https://bugs.openfoam.org/view.php?id=4054

src/fvMeshMovers/multiValveEngine/multiValveEngineState/multiValveEngineState.H

@@ -125,6 +125,13 @@ public:
             return wordList::null();
         }
 
+        //- Do not execute at the start of the run
+        //  as the clearance is not available at that point
+        virtual bool executeAtStart() const
+        {
+            return false;
+        }
+
         //- Execute, currently does nothing
         virtual bool execute();