Code review comment for ~pjdc/discourse-charm/+git/discourse-charm:use-stable-discourse

> I'm not sure if it's related to your change, but I see this on the discourse
> unit for a related CI job:
>
> 2019-01-22 04:32:12 INFO juju-log db:3: Invoking reactive handler:
> reactive/discourse.py:135:prepare_codebase
> 2019-01-22 04:32:13 INFO juju-log db:3: Ruby error: ['LoadError: cannot load
> such file -- /usr/share/rubygems-integration/all/specifications/exe/rake', "
> /usr/local/bin/rake:23:in `load'", " /usr/local/bin/rake:23:in `<top
> (required)>'"]
> 2019-01-22 04:32:13 ERROR juju.worker.uniter.operation runhook.go:132 hook
> "db-relation-changed" failed: exit status 1
> 2019-01-22 04:32:13 INFO juju.worker.uniter resolver.go:124 awaiting error
> resolution for "relation-changed" hook

It's looking like the charm just does not work properly right now! I'm investigating.