horizon 15.3.0 release

meta:version: 15.3.0
meta:diff-start: -
meta:series: stein
meta:release-type: release
meta:pypi: no
meta:first: no
meta:release:Author: Tobias Urdin <tobias.urdin@binero.se>
meta:release:Commit: Akihiro Motoki <amotoki@gmail.com>
meta:release:Co-Authored-By: Akihiro Motoki <amotoki@gmail.com>
meta:release:Change-Id: I873fa2030319e43edd67d55c3c0c1f3d6aba6617
meta:release:Code-Review+1: Ivan Kolodyazhny <e0ne@e0ne.info>
meta:release:Code-Review+2: Sean McGinnis <sean.mcginnis@gmail.com>
meta:release:Code-Review+2: Thierry Carrez <thierry@openstack.org>
meta:release:Workflow+1: Thierry Carrez <thierry@openstack.org>
-----BEGIN PGP SIGNATURE-----
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=+rM5
-----END PGP SIGNATURE-----