oslo.metrics 0.11.0 release

meta:version: 0.11.0
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: Elod Illes <elod.illes@est.tech>
meta:release:Commit: Elod Illes <elod.illes@est.tech>
meta:release:Change-Id: Ie360ecc1840e3469c7190cda19295ab3e2de3b6b
meta:release:Workflow+1: Elod Illes <elod.illes@est.tech>
meta:release:Code-Review+2: Elod Illes <elod.illes@est.tech>
meta:release:Code-Review+2: Thierry Carrez <thierry@openstack.org>
meta:release:Code-Review+1: Daniel Bengtsson <dbengt@redhat.com>