ENH: add remove objects handling in timeFunctionObject and regionFunctionObject

- makes it easier to implement functionObject or field object removal

src/functionObjects/utilities/systemCall/systemCall.C

@@ -90,8 +90,8 @@ Foam::functionObjects::systemCall::systemCall
 :
     functionObject(name),
     executeCalls_(),
-    endCalls_(),
     writeCalls_(),
+    endCalls_(),
     masterOnly_(false)
 {
     read(dict);

src/functionObjects/utilities/systemCall/systemCall.H

@@ -118,12 +118,12 @@ protected:
         //- List of calls to execute - every step
         stringList executeCalls_;
 
-        //- List of calls to execute when exiting the time-loop
-        stringList endCalls_;
-
         //- List of calls to execute - write steps
         stringList writeCalls_;
 
+        //- List of calls to execute when exiting the time-loop
+        stringList endCalls_;
+
         //- Perform system calls on the master only
         bool masterOnly_;