Updated openstack/openstack
Project: openstack/swift  dba3fc317905c9fa542ac7924c879f4be793136a

Prefer X-Backend-Timestamp for X-Newest

When a X-Backend-Timestamp is available it would generally preferred
over a less specific value and sorts correctly against any X-Timestamp
values anyway.

Change-Id: I08b7eb37ab8bd6eb3afbb7dee44ed07a8c69b57e