Git commits in Moodle 2.7.5 by Marina Glancy

commit 3db52fd27fcb7ea74ba9e12c47814fc3fe6fd31f
Author: Marina Glancy <marina@moodle.com>
Date:   Wed, 28 Jan 2015 16:47:50 +0800
Tag:    v2.7.5

MDL-48978 user: fixed regression from MDL-37704


commit 9beca92ae69356fccb90ec0efd357795047f8424
Author: Marina Glancy <marina@moodle.com>
Date:   Thu, 15 Jan 2015 11:12:01 +0800
Tag:    v2.7.5

MDL-48847 groups: fixed incorrect user count