swift 2.13.0 release

meta:version: 2.13.0
meta:diff-start: -
meta:series: ocata
meta:release-type: release
meta:pypi: no
meta:first: no
meta:release:Author: John Dickinson <me@not.mn>
meta:release:Commit: John Dickinson <me@not.mn>
meta:release:Change-Id: I997c1321350fd1ad42aa66fc5bdbc5493b466ad0
meta:release:Code-Review+2: Thierry Carrez <thierry@openstack.org>
meta:release:Workflow+1: Thierry Carrez <thierry@openstack.org>
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