Git commits in Moodle 2.1.5 by Kyle Temkin

commit 5779bd391594315468281d039286531b37e02c6f
Author: Kyle Temkin <ktemkin@binghamton.edu>
Date:   Tue, 31 Jan 2012 01:45:49 +0800
Tag:    v2.1.5

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