Author: Marina Glancy
MDL-34189 cohorts: Allow admin/manager to see all cohorts on one page
http://git.moodle.org/gw?p=moodle.git;a=commit;h=274dc06881635804a03066c8c0de83e519332cfb
http://github.com/moodle/moodle/commit/274dc06881635804a03066c8c0de83e519332cfb
+ 2.8 en [allcohorts,core_cohort]
+ 2.8 en [systemcohorts,core_cohort]