one more test case for ipv4 gateway
one more test case for ipv4 gateway

Change-Id: I6aa63566ddb6a0a25c724a727efb0f4470475e22

dreamhost/akanda-rug,stackforge/akanda-rug,openstack/akanda-rug,markmcclain/astara,stackforge/akanda-rug,openstack/akanda-rug