ironic 12.1.6 release

meta:version: 12.1.6
meta:diff-start: -
meta:series: stein
meta:release-type: release
meta:pypi: no
meta:first: no
meta:release:Author: Dmitry Tantsur <dtantsur@protonmail.com>
meta:release:Commit: Dmitry Tantsur <dtantsur@protonmail.com>
meta:release:Change-Id: I194a8afc7a7d93226dd827224db343a121bc7bd4
meta:release:Code-Review+2: Hervé Beraud <hberaud@redhat.com>
meta:release:Code-Review+2: Sean McGinnis <sean.mcginnis@gmail.com>
meta:release:Workflow+1: Sean McGinnis <sean.mcginnis@gmail.com>