Use oslo_messaging_notifications for mitaka or later releases
including setting the transport_url to the value provided by
the AMQP context.
This removes use of deprecated configuration options for
ceilometer notifications.
Change-Id: I6f6f3d7f2e423aecf5be7cab08da560e291e5845
- Add Zesty as a supported series to metadata.yaml.
- Turn on Xenial-Ocata Amulet test definitions.
- Sync charm helpers to get Juju 2.x amulet compatibility.
- Keeping Zesty-Ocata Amulet test definitions turned off until the
metadata.yaml changes propagate to the charm store.
Change-Id: I99120d250e3de5015552a9dda1963a2a72ac7119