Git commits in Moodle 3.6.7 by cescobedo

commit 829c7c9a1b2cf1fad68491ad5265f343ed8a965c
Author: cescobedo <carlos.escobedo@gmail.com>
Date:   Thu, 07 Nov 2019 17:17:28 +0800
Tag:    v3.6.7

MDL-66683 core: Revert MDL-66181 because created regressions


commit 4d10388df27f03833e23183d325642156ffc21da
Author: cescobedo <carlos.escobedo@gmail.com>
Date:   Wed, 06 Nov 2019 20:37:09 +0800
Tag:    v3.6.7

MDL-66257 tool_cohortroles: Unassign the role on removal cohortroles.