Git commits in Moodle 3.5.8 by sam marshall

commit 9f1149ac1386b59e53fe4141929603271f023e9f
Author: sam marshall <s.marshall@open.ac.uk>
Date:   Thu, 15 Aug 2019 20:10:13 +0800
Tag:    v3.5.8

MDL-66378 Behat: Speed up 'before/after' step in Chrome

commit 0498684ae23b00f1887478a326e4efc75c71686f
Author: sam marshall <s.marshall@open.ac.uk>
Date:   Fri, 12 Jul 2019 18:50:51 +0800
Tag:    v3.5.8

MDL-66132 Search: Behat tests should use simpledb, fix mock count