ironic 16.0.0 release

meta:version: 16.0.0
meta:diff-start: -
meta:series: victoria
meta:release-type: release
meta:pypi: no
meta:first: no
meta:release:Author: Julia Kreger <juliaashleykreger@gmail.com>
meta:release:Commit: Julia Kreger <juliaashleykreger@gmail.com>
meta:release:Change-Id: I5d4fafd73e06160b6d721316726360c48be118c5
meta:release:Code-Review+2: Sean McGinnis <sean.mcginnis@gmail.com>
meta:release:Code-Review+2: Hervé Beraud <hberaud@redhat.com>
meta:release:Workflow+1: Hervé Beraud <hberaud@redhat.com>