python-barbicanclient 5.4.0 release

meta:version: 5.4.0
meta:diff-start: -
meta:series: zed
meta:release-type: release
meta:pypi: no
meta:first: yes
meta:release:Author: Elod Illes <elod.illes@est.tech>
meta:release:Commit: Elod Illes <elod.illes@est.tech>
meta:release:Change-Id: Ib8b71e69cdc62a74a7fdfaca4eea4c05e2e82a35
meta:release:Code-Review+2: Hervé Beraud <herveberaud.pro@gmail.com>
meta:release:Code-Review+2: Elod Illes <elod.illes@est.tech>
meta:release:Workflow+1: Elod Illes <elod.illes@est.tech>
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