keystonemiddleware 9.4.0 release

meta:version: 9.4.0
meta:diff-start: -
meta:series: yoga
meta:release-type: release
meta:pypi: yes
meta:first: yes
meta:release:Author: Daniel Bengtsson <dbengt@redhat.com>
meta:release:Commit: Daniel Bengtsson <dbengt@redhat.com>
meta:release:Change-Id: I75efb082cbf9237fa95c8ed5d8cb963c053ede74
meta:release:Code-Review+1: Gage Hugo <gagehugo@gmail.com>
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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