Normation/rudder — pull request #709 by fanf (2014-12-09 15:34:42+00:00)
Title: Fixes #5923: System rule are modified when trying to delete a directive

Basically switch the deletion order so that if the directive can't be deleted, it is not removed from rules (because it's less a problem to have rules with unknown directives, we can still go delete them by hand)