switch2container: chown symlink for devices

switch2container: chown symlink for devices

If the OSD directory is using symlinks for referencing devices (like
block, db, wal for bluestore and journal for filestore) then the chown
command could fail to change the owner:group on some system.

$ ls -hl /var/lib/ceph/osd/ceph-0/
total 28K
lrwxrwxrwx 1 ceph ceph 92 Sep 15 01:53 block -> /dev/ceph-45113532-95ca-471b-bd75-51de46f1339c/osd-data-570a1aee-60c0-44c9-8036-ffed7d67a4e6
-rw------- 1 ceph ceph 37 Sep 15 01:53 ceph_fsid
-rw------- 1 ceph ceph 37 Sep 15 01:53 fsid
-rw------- 1 ceph ceph 55 Sep 15 01:53 keyring
-rw------- 1 ceph ceph  6 Sep 15 01:53 ready
-rw------- 1 ceph ceph  3 Sep 15 02:00 require_osd_release
-rw------- 1 ceph ceph 10 Sep 15 01:53 type
-rw------- 1 ceph ceph  2 Sep 15 01:53 whoami
$ find /var/lib/ceph/osd/ceph-0 -not -user 167 -execdir chown 167:167 {} +
chown: cannot dereference './block': Permission denied
$ find /var/lib/ceph/osd/ceph-0 -not -user 167
/var/lib/ceph/osd/ceph-0/block

Signed-off-by: Dimitri Savineau <dsavinea@redhat.com>