This change ensures that when ceph is upgraded from an
older version that uses root to a newer version that
uses ceph as the process owner that all directories
are chowned.
As the ceph charm can also host OSD processes, ensure that
any ceph-osd daemons are stopped and started during the
upgrade process.
Change-Id: Ief3fd6352b440b7740965746cd0d1d846c647f84
Closes-Bug: 1600338
(cherry picked from commit 001d890d42)