LXC from native: migrate veth network configuration
    
    Some of the LXC configuration properties aren't migrated since they
    would only cause problems in libvirt-lxc:
      * lxc.network.ipv[46]: LXC driver doesn't setup IP address of guests,
        see rhbz#1059624
      * lxc.network.name, see rhbz#1059630