functionObjectList: Added automatic timeControl wrapping when either writeControl or executeControl entries are present

timeControl functionality is supported for both execution and writing but
previously only instantiated if the writeControl entry is present in the
functionObject dictionary, now it is also instantiated if only the
executeControl entry is present as the functionObject might only have execute
functionality.

src/OpenFOAM/db/functionObjects/functionObjectList/functionObjectList.C

@@ -31,7 +31,6 @@ License
 #include "etcFiles.H"
 #include "wordAndDictionary.H"
 
-
 /* * * * * * * * * * * * * * * Static Member Data  * * * * * * * * * * * * * */
 
 Foam::fileName Foam::functionObjectList::functionObjectDictPath
@@ -791,7 +790,8 @@ bool Foam::functionObjectList::read()
 
                 if
                 (
-                    dict.found("writeControl")
+                    dict.found("executeControl")
+                 || dict.found("writeControl")
                  || dict.found("outputControl")
                 )
                 {