ceph_test_rados: add missing kick for rollback

This was broken by the refactor in 96aaa5e3a371ade8b91ad9ab991d996eaef2cea5
and can make us hang.

Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: Samuel Just <sam.just@inktank.com>
doc: Updated manual install to include sync agent, ARM packages, and DNS configuration.

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
Merge git://github.com/ceph/ceph