Do not leak ipvs netlink socket
Do not leak ipvs netlink socket

Signed-off-by: Alessandro Boch <5bd2eb5b6f60921d9a2b9cb6a0a86bb947f3d361@docker.com>

tmakita/libnetwork,kolyshkin/libnetwork,mbanikazemi/libnetwork,fcrisciani/libnetwork,allencloud/libnetwork,vdemeester/libnetwork,docker/libnetwork,medallia/libnetwork,abhi/libnetwork,kolyshkin/libnetwork,ityangchen/libnetwork,fcrisciani/libnetwork,mahak/libnetwork,medallia/libnetwork,vdemeester/libnetwork,allencloud/libnetwork,vdemeester/libnetwork,WeiZhang555/libnetwork,mahak/libnetwork,ityangchen/libnetwork,kolyshkin/libnetwork,abhi/libnetwork,docker/libnetwork,tmakita/libnetwork,abhi/libnetwork,medallia/libnetwork,mbanikazemi/libnetwork,mahak/libnetwork,docker/libnetwork,WeiZhang555/libnetwork