Git commits in Moodle 2.7.6 by Sara Cenni

commit 4d65e9527e15e50cbc4a722251f981265c7995f2
Author: Sara Cenni <sara.cenni@unibo.it>
Date:   Tue, 10 Feb 2015 19:10:07 +0800
Tag:    v2.7.6

MDL-40776 grade: fix query for report outcomes