Git commits in Moodle 2.5.x by Simey Lameze

commit 27692563f3e9eeb82cb8dce5f4ee408adf1e75a5
Author: Simey Lameze <lameze@gmail.com>
Date:   Thu, 15 May 2014 15:00:56 +0800
Tag:    v2.5.7

MDL-45323 grade: Unit test for grade_get_grade_items_for_activity()

commit 07981af07a93c45fc3a903daa4c23ba35713944b
Author: Simey Lameze <lameze@gmail.com>
Date:   Thu, 15 May 2014 15:00:03 +0800
Tag:    v2.5.7

MDL-45323 grade: Fix query errors on grade_get_grade_for_activity method.