Git commits in Moodle 2.2.x by Igor Sazonov

commit 8f64668af2fb801a1803f8f62e1b18eaabd5a4bb
Author: Igor Sazonov <sovletig@yandex.ru>
Date:   Fri, 02 Dec 2011 00:21:07 +0800
Tag:    v2.2.1

MDL-27314 quiz attempts cannot be deleted in separate groups mode.