Add a top-level `owners` resource.
A new top-level resource <api>/owners can be used to get the list of server owners as IUsers. (Closes #135 (closed))
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
A new top-level resource <api>/owners can be used to get the list of server owners as IUsers. (Closes #135 (closed))