Code review comment for lp://staging/~wallyworld/juju-core/ec2-live-tests-fix

NOT LGTM

I've probably not been clear in communicating this, but the default
series, across the board, is *precise*. The charm ecosystem is such that
there is very little reason to deploy to any other series: the
assertions are wrong, not the setup.

https://codereview.appspot.com/8904043/