ironic-python-agent 4.0.0 release

meta:version: 4.0.0
meta:diff-start: -
meta:series: train
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: I365e242cad93f76aa5ad88ec420008afa40d1f29
meta:release:Code-Review+1: Riccardo Pittau <elfosardo@gmail.com>
meta:release:Code-Review+2: Sean McGinnis <sean.mcginnis@gmail.com>
meta:release:Workflow+1: Sean McGinnis <sean.mcginnis@gmail.com>
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