oslo.db 4.40.0 release

meta:version: 4.40.0
meta:diff-start: -
meta:series: rocky
meta:release-type: release
meta:pypi: yes
meta:first: no
meta:release:Author: Julien Danjou <julien@danjou.info>
meta:release:Commit: Julien Danjou <julien@danjou.info>
meta:release:Change-Id: I97df8b810e3cb17da3c60e8f8c3aa98966c70cf5
meta:release:Code-Review+2: Tony Breeds <tony@bakeyournoodle.com>
meta:release:Code-Review+1: qingszhao <zhao.daqing@99cloud.net>
meta:release:Code-Review+1: Alessandro Nesta <huang.zhiping@99cloud.net>
meta:release:Code-Review+1: wu.chunyang <wu.chunyang@99cloud.net>
meta:release:Code-Review+2: Doug Hellmann <doug@doughellmann.com>
meta:release:Workflow+1: Doug Hellmann <doug@doughellmann.com>
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