Author: Amaia Anabitarte
MDL-62920 user: Uploading deleted user and adding to a cohort
http://git.moodle.org/gw?p=moodle.git;a=commit;h=8b32d682a5d245147a017a0e171f14fcfcbe21e4
http://github.com/moodle/moodle/commit/8b32d682a5d245147a017a0e171f14fcfcbe21e4
+ 3.5 en [deleteduser,core_bulkusers]