src/OpenFOAM: Rationalised use of enumerations by using the C++11 scoped form

for

    db/functionObjects/timeControl/timeControl.H: timeControls
    primitives/bools/Switch/Switch.H: class switchType
    primitives/strings/fileName/fileName.H: fileType
    primitives/strings/wordRe/wordRe.H: compOption

applications/utilities/postProcessing/dataConversion/foamToTecplot360/foamToTecplot360.C

@@ -1213,7 +1213,7 @@ int main(int argc, char *argv[])
             readDir
             (
                 runTime.timePath()/regionPrefix/cloud::prefix,
-                fileName::DIRECTORY
+                fileType::directory
             )
         );