Git commits in Moodle 2.9.5 by Dani Palou

commit 15b9554a3bf15683efe9bdfe6637f18a748e490b
Author: Dani Palou <dani@moodle.com>
Date:   Thu, 04 Feb 2016 16:48:58 +0800
Tag:    v2.9.5

MDL-52993 wiki: Add unit tests for wiki_user_can_edit

commit 900f56bcf2cca6d657fe001084444d18b1245755
Author: Dani Palou <dani@moodle.com>
Date:   Tue, 26 Jan 2016 18:53:21 +0800
Tag:    v2.9.5

MDL-51704 survey: Fix display problems in report page

commit eea379ed55e0778680bb279d1f8193076ce4c404
Author: Dani Palou <dani@moodle.com>
Date:   Tue, 26 Jan 2016 15:55:55 +0800
Tag:    v2.9.5

MDL-49612 forum: Fix some external_value creation in params declaration

commit 48426a041d114063946ad0c1994f78971505d722
Author: Dani Palou <dani@moodle.com>
Date:   Tue, 19 Jan 2016 18:24:12 +0800
Tag:    v2.9.5

MDL-52993 wiki: Fix wiki_user_can_edit for collab and separate groups