Updated openstack/openstack
Project: openstack/nova  d533c9b7929e8d36ad349a07b01794baa8e47262
null
Claim IPv6 is unsupported if no interface with IPv6 configured

When IPv6 is supported by glibc but no interface
is configured to use ipv6 (because the ipv6 module
is not loaded), skip ipv6 related checks.

Change-Id: I15aaf3d01f0f51bdc0bd29f30728ca2ab8b5c30a