oslo.db 17.2.1 release

meta:version: 17.2.1
meta:team: oslo
meta:diff-start: -
meta:series: epoxy
meta:branch: master
meta:release-type: release
meta:pypi: yes
meta:first: no
meta:release:Author: Takashi Kajinami <kajinamit@oss.nttdata.com>
meta:release:Commit: Takashi Kajinami <kajinamit@oss.nttdata.com>
meta:release:Change-Id: I3de5e5179dc3110b8ed9a87ecf3e23fc6ad14145
meta:release:Code-Review+1: Goutham Pacha Ravi <gouthampravi@gmail.com>
meta:release:Code-Review+1: Daniel Bengtsson <dbengt@redhat.com>
meta:release:Code-Review+2: Dr. Jens Harbott <frickler@offenerstapel.de>
meta:release:Code-Review+2: Elod Illes <elod.illes@est.tech>
meta:release:Workflow+1: Dr. Jens Harbott <frickler@offenerstapel.de>