Ensure that the directory in /var/lib/ceph/mon for the local
mon unit is user writable, ensuring that ceph-mon daemons
>= Luminous are able to start.
Closes-Bug: 1742083
Change-Id: I9cac4bd258b7038738a693329588420696eac703
Helper functions for the ceph charms. This library has shared functionality that is used in the ceph-mon, ceph-osd and ceph
charms. Anything that needs to be shared across the ceph charms should live here.