Git commits in Moodle 2.2.2 by Kyle Temkin

commit c31783bb34d27408b288a3d95469737d902fa431
Author: Kyle Temkin <ktemkin@binghamton.edu>
Date:   Tue, 31 Jan 2012 01:45:49 +0800
Tag:    v2.2.2

MDL-31407 quiz: finish_attempt method should not rely on $USER