rbd-mirror: use a sorted list for peer token content

The monitor list was not sorted, so each time we were reconciling, the
peer secret token will see its content updated with randomized
monitors. This would enter our predicate and trigger a reconcile.
Potentially an endless one, if the randomized list is already different.

Closes: #9076
Signed-off-by: Sébastien Han <seb@redhat.com>
(cherry picked from commit 8cb6cdc)

pkg/daemon/ceph/client/mirror.go

@@ -371,7 +371,7 @@ func CreateRBDMirrorBootstrapPeerWithoutPool(context *clusterd.Context, clusterI
 		ClusterFSID: clusterInfo.FSID,
 		ClientID:    rbdMirrorPeerKeyringID,
 		Key:         key,
-		MonHost:     strings.Join(mons.UnsortedList(), ","),
+		MonHost:     strings.Join(mons.List(), ","),
 		Namespace:   clusterInfo.Namespace,
 	}