ironic 15.2.0 release

meta:version: 15.2.0
meta:diff-start: -
meta:series: victoria
meta:release-type: release
meta:pypi: no
meta:first: no
meta:release:Author: Riccardo Pittau <elfosardo@gmail.com>
meta:release:Commit: Riccardo Pittau <elfosardo@gmail.com>
meta:release:Change-Id: I3b592e363a3a85201c0913727f57b7798e6fcdf2
meta:release:Code-Review+2: Sean McGinnis <sean.mcginnis@gmail.com>
meta:release:Code-Review+2: Hervé Beraud <hberaud@redhat.com>
meta:release:Code-Review+1: Julia Kreger <juliaashleykreger@gmail.com>
meta:release:Workflow+1: Sean McGinnis <sean.mcginnis@gmail.com>
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