magnum-tempest-plugin 0.3.0 release

meta:version: 0.3.0
meta:diff-start: -
meta:series: train
meta:release-type: release
meta:pypi: no
meta:first: yes
meta:release:Author: Jean-Philippe Evrard <jean-philippe@evrard.me>
meta:release:Commit: Jean-Philippe Evrard <jean-philippe@evrard.me>
meta:release:Change-Id: I4547f4bcb92b5dd1d0344772def384cb8b033104
meta:release:Code-Review+1: Feilong Wang <flwang@catalyst.net.nz>
meta:release:Code-Review+2: Thierry Carrez <thierry@openstack.org>
meta:release:Workflow+1: Thierry Carrez <thierry@openstack.org>