BUG: polyMesh constructor AUTO_WRITE flag, ignored readOpt (#1147)

- fixed some more places with an explicit AUTO_WRITE.

BUG: revert handling of the readOption. It should not be NO_READ.

  In cases where the user a IOobject without specifying read/write, it
  defaults to NO_READ anyhow. However, the move constructor can also
  be called with empty lists and a read option. This has the same
  signature, but obviously will not work with NO_READ.

applications/utilities/mesh/advanced/refinementLevel/refinementLevel.C

@@ -213,7 +213,9 @@ int main(int argc, char *argv[])
         (
             fvMesh::defaultRegion,
             runTime.timeName(),
-            runTime
+            runTime,
+            IOobject::NO_READ,
+            IOobject::AUTO_WRITE
         ),
         pointField(mesh.points()),  // Could we safely re-use the data?
         faceList(mesh.faces()),