ceilometermiddleware 2.2.0 release

meta:version: 2.2.0
meta:diff-start: -
meta:series: wallaby
meta:release-type: release
meta:pypi: yes
meta:first: yes
meta:release:Author: Thierry Carrez <thierry@openstack.org>
meta:release:Commit: Thierry Carrez <thierry@openstack.org>
meta:release:Change-Id: Ib0a1fd078ed84eb88ca42602f6c2c0880cf64f6e
meta:release:Code-Review+1: Matthias Runge <mrunge@redhat.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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