Author: Aaron Barnes
MDL-37473 completion: Add missing cap checks to tracked users functions
Namely get_num_tracked_users and is_tracked_user()
http://git.moodle.org/gw?p=moodle.git;a=commit;h=d4d06686f7a20c5077b8abe6ba48ece937704a05
http://github.com/moodle/moodle/commit/d4d06686f7a20c5077b8abe6ba48ece937704a05
+ 2.3 en [nottracked,core_completion]