Add sample config entry for reserved_domain_suffixes
Add sample config entry for reserved_domain_suffixes

Change-Id: Ib642986e216e6d28c9553afb0aa5a8167776d354

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