ceph_manager: don't mark out an out osd on kill_osd(..., mark_out=True)
ceph_manager: don't mark out an out osd on kill_osd(..., mark_out=True)

Fixes

2013-07-27T02:02:23.879 INFO:teuthology.task.thrashosds.thrasher:Recovered, killing an osd
2013-07-27T02:02:23.879 INFO:teuthology.task.thrashosds.thrasher:Killing osd 2, live_osds are [3, 4, 0, 1, 5, 2]
2013-07-27T02:02:24.547 INFO:teuthology.task.thrashosds.thrasher:Removing osd 2, in_osds are: [4, 0, 1, 5]
...
ValueError: list.remove(x): x not in list

Signed-off-by: Sage Weil <6dd34506bbd5e58221bbb3e4732d97c91f02277b@inktank.com>

michaelsevilla/teuthology,robbat2/teuthology,dreamhost/teuthology,ktdreyer/teuthology,michaelsevilla/teuthology,zhouyuan/teuthology,tchaikov/teuthology,yghannam/teuthology,zhouyuan/teuthology,t-miyamae/teuthology,caibo2014/teuthology,ceph/teuthology,dmick/teuthology,tchaikov/teuthology,ivotron/teuthology,SUSE/teuthology,ceph/teuthology,ktdreyer/teuthology,robbat2/teuthology,dmick/teuthology,t-miyamae/teuthology,dmick/teuthology,SUSE/teuthology,SUSE/teuthology,yghannam/teuthology,dreamhost/teuthology,ivotron/teuthology,caibo2014/teuthology