Add LDAP backwards-compatibility fix
Add missing entry for an EE fix in the 9.5.2 blog post: https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/2690
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Add missing entry for an EE fix in the 9.5.2 blog post: https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/2690