Git merges in Moodle 3.7.7 by Andrew Nicols

commit 84388a2e3093cb4ac78be2418996cf77c005ac54
Author: Andrew Nicols <andrew@nicols.co.uk>
Date:   Wed, 08 Jul 2020 12:22:37 +0800
Tag:    v3.7.7

Merge branch 'm37_MDL-66322_Travis_Run_Using_Docker_ExtTests' of https://github.com/scara/moodle into MOODLE_37_STABLE

commit ebdf85d6381d55ec233c62dd9463eee3d5700e53
Author: Andrew Nicols <andrew@nicols.co.uk>
Date:   Thu, 11 Jun 2020 11:27:09 +0800
Tag:    v3.7.7

Merge branch 'MDL-69002-37' of git://github.com/sarjona/moodle into MOODLE_37_STABLE

commit bff7ea04357db4defeb4602dd47a6cc8d4a40602
Author: Andrew Nicols <andrew@nicols.co.uk>
Date:   Mon, 25 May 2020 15:49:58 +0800
Tag:    v3.7.7

Merge branch 'MDL-68658_37' of https://github.com/stronk7/moodle into MOODLE_37_STABLE

commit 7738116fd51e7193fad28152aa694297d6fd7107
Author: Andrew Nicols <andrew@nicols.co.uk>
Date:   Mon, 18 May 2020 20:33:30 +0800
Tag:    v3.7.7

Merge branch 'MDL-68503_37_STABLE' of https://github.com/marxjohnson/moodle into MOODLE_37_STABLE

commit 4e2dd1a3a834e5194495c5138957e7dc25c2e049
Author: Andrew Nicols <andrew@nicols.co.uk>
Date:   Fri, 15 May 2020 10:55:22 +0800
Tag:    v3.7.7

Merge branch 'MDL-66917-37' of https://github.com/paulholden/moodle into MOODLE_37_STABLE