Improve MDAO performance logging block
Improve MDAO performance logging block

* Use toString instead of createStatement for logging
* Remove a resolved TODO comment
* Add a debug statement to show predicate before and after
  simplification

foam-framework/foam2,foam-framework/foam2,jacksonic/vjlofvhjfgm,jacksonic/vjlofvhjfgm,foam-framework/foam2,foam-framework/foam2,foam-framework/foam2,jacksonic/vjlofvhjfgm