Git commits in Moodle 2.8.9 by David Mudrák

commit b4ccb1385572c56a41ef65c702a247ba9dd87f86
Author: David Mudrák <david@moodle.com>
Date:   Tue, 03 Nov 2015 05:52:20 +0800
Tag:    v2.8.9

MDL-52018 lang: Fix behat test to use the new string


commit fa36f1d1ab78605442d2e2730f78aacb80f52c2f
Author: David Mudrák <david@moodle.com>
Date:   Wed, 02 Sep 2015 04:57:59 +0800
Tag:    v2.8.9

MDL-48165 workshop: Validate the rubric editing form


commit 235d8a4196ed7e65a52cfce035e04b957cd544fe
Author: David Mudrák <david@moodle.com>
Date:   Wed, 02 Sep 2015 04:57:04 +0800
Tag:    v2.8.9

MDL-48165 workshop: Add support for assessment forms validation