Git commits in Moodle 2.9.0 by Sara Cenni

commit 54867385b2b48e5cb35b6d6f26fb21c1e9140e6b
Author: Sara Cenni <sara.cenni@unibo.it>
Date:   Wed, 11 Feb 2015 21:14:02 +0800
Tag:    v2.9.0-beta

MDL-40776 grade: fix query for report outcomes