Include setup-requires in tox.ini
Include setup-requires in tox.ini

Change-Id: Ia626ee77690eec3034d70a1e338bb5d427152720

melodous/designate,kiall/designate-py3,kiall/designate-py3,cneill/designate,cneill/designate,muraliselva10/designate,muraliselva10/designate,cneill/designate,ramsateesh/designate,kiall/designate-py3,ramsateesh/designate,openstack/designate,openstack/designate,tonyli71/designate,NeCTAR-RC/designate,richm/designate,ionrock/designate,cneill/designate,muraliselva10/designate,cneill/designate,openstack/designate,grahamhayes/designate,melodous/designate,NeCTAR-RC/designate,ionrock/designate,cneill/designate-testing,tonyli71/designate,grahamhayes/designate,cneill/designate-testing,ramsateesh/designate,melodous/designate,kiall/designate-py3,tonyli71/designate,ionrock/designate,kiall/designate-py3,grahamhayes/designate,melodous/designate,richm/designate,cneill/designate-testing