Git commits in Moodle 3.6.6 by David Mudrák

commit 1f69f006970bcb364dd3e71e8ee996ad550e318c
Author: David Mudrák <david@moodle.com>
Date:   Thu, 29 Aug 2019 23:39:32 +0800
Tag:    v3.6.6

MDL-66504 lang: Use the new strings in the Behat scenario

commit 2bcad30213ad50b8bd9b6cb5be17f40ae0620bb5
Author: David Mudrák <david@moodle.com>
Date:   Tue, 27 Aug 2019 03:29:16 +0800
Tag:    v3.6.6

MDL-66500 lang: Do not mark unoconvwarning as deprecated