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=acca768961a4aaf603cc8628b0408fa33161948f
http://github.com/moodle/moodle/commit/acca768961a4aaf603cc8628b0408fa33161948f
+ 3.4 en [deleteduser,core_bulkusers]