TUT: simple test for redistributePar with distributed roots

TUT: prefer 'subtract' instead of old 'delete'

TUT: enable multiFieldValue function object, update topoSet action

tutorials/mesh/extrudeMesh/faceZoneExtrusion/system/topoSetDict

@@ -27,7 +27,7 @@ actions
     {
         name    f0;
         type    faceSet;
-        action  delete;
+        action  subtract;
         source  boundaryToFace;
     }