Updated openstack/openstack
Project: openstack-dev/devstack  4407315ae9c2dad3c85544afefaf12e8e7cc2c9f

Support Router Advertisement Daemon (radvd) for IPv6

Install radvd if the l3 service is enabled.

Partially implements blueprint: neutron-ipv6-radvd-ra

Change-Id: I749b31dcaad072a35e5921579b50f1ca451b1383