Refactor commits API documentation
Blocked by https://gitlab.com/gitlab-org/gitlab-ce/issues/10960 which needs to be fixed or documented.
Closes #4217 (closed)
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Blocked by https://gitlab.com/gitlab-org/gitlab-ce/issues/10960 which needs to be fixed or documented.
Closes #4217 (closed)