mon: fix osdmap trim
mon: fix osdmap trim

We can raise the floor even when min_last_epoch_clean if very close to
the current version, as long as it is still above the oldest.

Signed-off-by: Sage Weil <c5b6ff1fd4f0bde10db63d7a3e07166cf6c4229f@dreamhost.com>

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