python-designateclient 2.2.0 release

meta:version: 2.2.0
meta:series: newton
meta:release-type: release
meta:announce: openstack-announce@lists.openstack.org
meta:pypi: yes
meta:first: yes
meta:release:Author: Graham Hayes <graham.hayes@hpe.com>
meta:release:Commit: Davanum Srinivas <davanum@gmail.com>
meta:release:Change-Id: I94ea7d4d3a5f2d068df10a5751fa8d0300a9f050
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