- 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.
- Resync tox.ini to resolve amulet test failures.
Change-Id: Ib07bdddd6e79f73785105ba4844c7aca654231b0