Only attempt XFR if zone.type is SECONDARY
Only attempt XFR if zone.type is SECONDARY

Change-Id: I6b18c9da864f9139ac9d729d70ebd020c58747fc

kiall/designate-py3,openstack/designate,cneill/designate,grahamhayes/designate,openstack/designate,muraliselva10/designate,ionrock/designate,muraliselva10/designate,kiall/designate-py3,ramsateesh/designate,kiall/designate-py3,muraliselva10/designate,ionrock/designate,grahamhayes/designate,cneill/designate-testing,cneill/designate-testing,tonyli71/designate,ionrock/designate,kiall/designate-py3,tonyli71/designate,kiall/designate-py3,cneill/designate,ramsateesh/designate,grahamhayes/designate,openstack/designate,tonyli71/designate,cneill/designate,ramsateesh/designate,cneill/designate-testing,cneill/designate,cneill/designate