horizon 12.0.0 release

meta:version: 12.0.0
meta:diff-start: -
meta:series: pike
meta:release-type: release
meta:pypi: no
meta:first: yes
meta:release:Author: Doug Hellmann <doug@doughellmann.com>
meta:release:Commit: Doug Hellmann <doug@doughellmann.com>
meta:release:Change-Id: If0036bc7b600dbbda59151e00235fed07fa3fbff
meta:release:Code-Review+1: Eric Kao <ekcs.openstack@gmail.com>
meta:release:Code-Review+1: Telles Mota Vidal Nóbrega <tenobreg@redhat.com>
meta:release:Code-Review+1: Ying Zuo <yinzuo@cisco.com>
meta:release:Code-Review+1: Armando Migliaccio <armamig@gmail.com>
meta:release:Code-Review+1: Rico Lin <rico.lin@easystack.cn>
meta:release:Code-Review+1: Saad Zaher <eng.szaher@gmail.com>
meta:release:Code-Review+1: Kevin Benton <kevin@benton.pub>
meta:release:Code-Review+1: Andreas Jaeger <jaegerandi@gmail.com>
meta:release:Code-Review+1: Brian Rosmaita <rosmaita.fossdev@gmail.com>
meta:release:Code-Review+1: Felipe Monteiro <felipe.monteiro@att.com>
meta:release:Code-Review+1: Graham Hayes <ghayes@suse.de>
meta:release:Code-Review+1: Michael Johnson <johnsomor@gmail.com>
meta:release:Code-Review+1: Dave McCowan <dmccowan@cisco.com>
meta:release:Code-Review+1: Emilien Macchi <emilien@redhat.com>
meta:release:Code-Review+1: Ben Swartzlander <ben@swartzlander.org>
meta:release:Code-Review+2: Doug Hellmann <doug@doughellmann.com>
meta:release:Code-Review+2: Sean McGinnis <sean.mcginnis@gmail.com>
meta:release:Code-Review+1: Akihiro Motoki <amotoki@gmail.com>
meta:release:Code-Review+1: ChangBo Guo(gcb) <glongwave@gmail.com>
meta:release:Code-Review+1: Steven Dake <stdake@cisco.com>
meta:release:Code-Review+2: Davanum Srinivas (dims) <davanum@gmail.com>
meta:release:Code-Review+1: Erno Kuvaja <jokke@usr.fi>
meta:release:Code-Review+1: Claudiu Belu <cbelu@cloudbasesolutions.com>
meta:release:Code-Review+2: Thierry Carrez <thierry@openstack.org>
meta:release:Workflow+1: Thierry Carrez <thierry@openstack.org>
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