oslo.config 6.6.1 release

meta:version: 6.6.1
meta:diff-start: -
meta:series: stein
meta:release-type: release
meta:pypi: yes
meta:first: no
meta:release:Author: Ben Nemec <bnemec@redhat.com>
meta:release:Commit: Ben Nemec <bnemec@redhat.com>
meta:release:Change-Id: Ife16997e2ecd8bef92ad38f85814c61273f9c8af
meta:release:Code-Review+2: Sean McGinnis <sean.mcginnis@gmail.com>
meta:release:Workflow+1: Sean McGinnis <sean.mcginnis@gmail.com>