Author: Huong Nguyen
MDL-79128 adhoc_task: Implement failed ad-hoc task cleanup
Co-authored-by: Stevani Andolo <stevani.andolo@moodle.com>
http://git.moodle.org/gw?p=moodle.git;a=commit;h=f13392d23001437510879c37f38d419678f070ac
http://github.com/moodle/moodle/commit/f13392d23001437510879c37f38d419678f070ac
+ 4.4 en [task_adhoc_failed_retention,core_admin]
+ 4.4 en [task_adhoc_failed_retention_desc,core_admin]