osd: only update degraded object stats after peering
osd: only update degraded object stats after peering

This avoids incorrectly populating peer_missing[acting[i]], which
in turn screws up peering and recovery.

ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph