- 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: I906b0008fb15939334b993e25f977c0e8e3ed96c