fixup
rgw, cls_rgw: add accounted_size for object metadata entry

Signed-off-by: Yehuda Sadeh <yehuda@redhat.com>
rgw: remove unused code

Signed-off-by: Yehuda Sadeh <yehuda@redhat.com>
rgw: decouple object name from index representation

We can't have a direct mapping between the object name to the way we
index it in the bucket index. Have rgw_obj provide different
representations appropriately and use the proper ones where needed.

Signed-off-by: Yehuda Sadeh <yehuda@redhat.com>