Author: sam marshall
MDL-34228 Completion: Add capability that controls if a user is shown in reports
http://git.moodle.org/gw?p=moodle.git;a=commit;h=b61924d4821ec9af198334d5b3b1d6bc28f90959
http://github.com/moodle/moodle/commit/b61924d4821ec9af198334d5b3b1d6bc28f90959
+ 2.4 en [course:isincompletionreports,core_role]