* Fix type hint typos.
* Add one-time cloud env setup after delegation.
* Add generate_password to util.
* Add username/password support to HttpClient.
* Avoid pip requirement for ansible-test shell.
* Support provisioning Tower instances.
* Move sanity into directory.
* Omit abstract classes from returned subclass list.
* Split sanity tests out into plugins.
* Fix abstract class handling for Python 3.