ceph_manager: In Thrasher randomly remove past intervals

Signed-off-by: David Zafman <dzafman@redhat.com>
ceph_manager: Re-enable Thrasher ceph-objectstore-tool testing

Signed-off-by: David Zafman <dzafman@redhat.com>
ceph_manager: Thrasher fixes to run() calls to set check_status = False

Signed-off-by: David Zafman <dzafman@redhat.com>
ceph_manager: Fix Thrasher kill_osd() to ignore pool going away

Signed-off-by: David Zafman <dzafman@redhat.com>