ironic-lib 2.21.2 release

meta:version: 2.21.2
meta:diff-start: -
meta:series: train
meta:release-type: release
meta:pypi: yes
meta:first: no
meta:release:Author: Sean McGinnis <sean.mcginnis@gmail.com>
meta:release:Commit: Sean McGinnis <sean.mcginnis@gmail.com>
meta:release:Change-Id: I62475a28105a90f54f0a193850deaa8567b139f2
meta:release:Code-Review+1: Mark Goddard <mark@stackhpc.com>
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>