osd: avoid polluting peer_info with acting[0]
osd: avoid polluting peer_info with acting[0]

This can confuse code that iterates over peer_info and finds the primary
(with bad info).

Signed-off-by: Sage Weil <6dd34506bbd5e58221bbb3e4732d97c91f02277b@newdream.net>

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