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REF: https://governance.openstack.org/tc/reference/project-testing-interface.html http://lists.openstack.org/pipermail/openstack-dev/2017-December/125710.html http://lists.openstack.org/pipermail/openstack-dev/2018-March/128594.html This also re-organizes index.rst Change-Id: Ic2509e76d03c159cf40e84f6b5912fdabe826c8d