Zeppelin charm tests in our cloud weather report (cwr) have shown sporadic failures. Some of these seem to be caused by timeouts related to overly complex zeppelin smoke tests:
The Zeppelin charm doesn't need a full Hadoop cluster to smoke test it, so don't waste time/resources standing one up. Simplify the tests so we can smoke zeppelin in a reasonable amount of time and move on.
While we're here, update the readme to be more consistent with other bigtop charms.