container: change the way we force no logs inside the container

container: change the way we force no logs inside the container

Previously we were using ceph_conf_overrides however this doesn't play
nice for softwares like TripleO that uses ceph_conf_overrides inside its
own code. For now, and since this is the only occurence of this, we can
ensure no logs through the ceph conf template.

Closes: https://bugzilla.redhat.com/show_bug.cgi?id=1532619
Signed-off-by: Sébastien Han <seb@redhat.com>
(cherry picked from commit c2e04623a54007674ec60647a9e5ddd2da4f991b)
Signed-off-by: Sébastien Han <seb@redhat.com>