cls_rgw: rewrite rgw_bucket_complete_op to use update.
cls_rgw: rewrite rgw_bucket_complete_op to use update.

Unfortunately we can't do multiple writes via the interface -- the
second one will clobber the first one. So use the update functionality
and go through that pain instead.

Signed-off-by: Greg Farnum <0bcb4295d38ee745130ea5f2bb88ef4eef474e61@dreamhost.com>

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