Comment 8 for bug 1762431

The charm-helpers change is near trivial as suggested by Tilman:
https://github.com/juju/charm-helpers/pull/146

I will also add the other charms potentially affected. They will all require at minimum a charm-helpers sync.

We should look at keystone's handling of certificates as well. Although, the keystone charm is currently python 2 it is meant to go to python 3 soon.