Add device name to IPv6 default gateway since link local addresses require it and it doesn't hurt if it's not a link local address
Add device name to IPv6 default gateway since link local addresses require it
and it doesn't hurt if it's not a link local address

rackerlabs/openstack-guest-agents-unix,coreos/openstack-guest-agents-unix,coreos/openstack-guest-agents-unix,coreos/openstack-guest-agents-unix,rackerlabs/openstack-guest-agents-unix,prometheanfire/openstack-guest-agents-unix,joejulian/openstack-guest-agents-unix,rackerlabs/openstack-guest-agents-unix,prometheanfire/openstack-guest-agents-unix,coreos/openstack-guest-agents-unix,joejulian/openstack-guest-agents-unix,prometheanfire/openstack-guest-agents-unix,joejulian/openstack-guest-agents-unix