Git commits in Moodle 2.8.6 by Rex Lorenzo

commit 086f4b6e4f3519a398fe1337a3d8cacccae7a745
Author: Rex Lorenzo <rex@oid.ucla.edu>
Date:   Wed, 25 Feb 2015 04:50:30 +0800
Tag:    v2.8.6

MDL-48572 gradereport_grader: Average wrong with suspended users