osd: flush store ops after map update
osd: flush store ops after map update

Otherwise we can race:

 - queue delete+rewrite of pg log
 - unblock op queue
 - queue append to log
...
 - apply append
 - apply delete+rewrite

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