osd: fix mark_down on heartbeat_messenger addrs
osd: fix mark_down on heartbeat_messenger addrs

This fixes residual outgoing connect attempts and
subsequent 'wrong node' messages from old outgoing
osd_ping messages that never leave our queues.

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