`Board` should be `Boards` in new navigation
Same thing as https://gitlab.com/gitlab-org/gitlab-ee/issues/3015, but now for the latest master branch on EE.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Same thing as https://gitlab.com/gitlab-org/gitlab-ee/issues/3015, but now for the latest master branch on EE.