ceph_test_rados: fix update_object_full

Update at current snap, not the last snap we did an update.

Broken this this was introduced in 996af2d8fd8e60bcdce8e9408249b974521de24e

Signed-off-by: Sage Weil <sage@inktank.com>
ceph_test_rados: improve debug output

Signed-off-by: Sage Weil <sage@inktank.com>
ceph_test_rados: update for copy_from in begin, not finish

Signed-off-by: Sage Weil <sage@inktank.com>
ceph_test_rados: remove useless snapc setup

We update this on snap create and delete; no need to do it any other
time.

Signed-off-by: Sage Weil <sage@inktank.com>
Merge pull request #654 from ceph/wip-testrados

fix some issues with ceph_test_rados

Reviewed-by: Sage Weil <sage@inktank.com>