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=fb28b75b74df641603ad9770b0c49e1a83af1442
http://github.com/moodle/moodle/commit/fb28b75b74df641603ad9770b0c49e1a83af1442
+ 2.4 en [nottracked,core_completion]