horizon 12.0.1 release

meta:version: 12.0.1
meta:diff-start: -
meta:series: pike
meta:release-type: release
meta:pypi: no
meta:first: no
meta:release:Author: Ying Zuo <yinzuo@cisco.com>
meta:release:Commit: Ying Zuo <yinzuo@cisco.com>
meta:release:Change-Id: I254bc939f4f52c3c0b6cafd56cd5565117ef1a9b
meta:release:Code-Review+2: Doug Hellmann <doug@doughellmann.com>
meta:release:Code-Review+2: Tony Breeds <tony@bakeyournoodle.com>
meta:release:Workflow+1: Tony Breeds <tony@bakeyournoodle.com>