horizon 16.2.0 release

meta:version: 16.2.0
meta:diff-start: -
meta:series: train
meta:release-type: release
meta:pypi: no
meta:first: no
meta:release:Author: Akihiro Motoki <amotoki@gmail.com>
meta:release:Commit: Akihiro Motoki <amotoki@gmail.com>
meta:release:Change-Id: I88d55b32264b5316e7457d8e946cb40442f70b8e
meta:release:Code-Review+2: Sean McGinnis <sean.mcginnis@gmail.com>
meta:release:Code-Review+1: Vishal Manchanda <manchandavishal143@gmail.com>
meta:release:Code-Review+1: likui <likui@yovole.com>
meta:release:Code-Review+1: Ivan Kolodyazhny <e0ne@e0ne.info>
meta:release:Code-Review+1: Hervé Beraud <hberaud@redhat.com>
meta:release:Code-Review+2: Thierry Carrez <thierry@openstack.org>
meta:release:Workflow+1: Thierry Carrez <thierry@openstack.org>