Make sure to close nshandle in ipvs.New
Make sure to close nshandle in ipvs.New

Signed-off-by: Jana Radhakrishnan <045898bda7d4800fe4909a9831e702ab79e266be@docker.com>

ityangchen/libnetwork,kolyshkin/libnetwork,tmakita/libnetwork,mbanikazemi/libnetwork,vdemeester/libnetwork,WeiZhang555/libnetwork,YujiOshima/libnetwork,coolljt0725/libnetwork,mavenugo/libnetwork,docker/libnetwork,ityangchen/libnetwork,mYmNeo/libnetwork,medallia/libnetwork,docker/libnetwork,msabansal/libnetwork,WeiZhang555/libnetwork,mavenugo/libnetwork,mYmNeo/libnetwork,mbanikazemi/libnetwork,coolljt0725/libnetwork,kolyshkin/libnetwork,mahak/libnetwork,cpuguy83/libnetwork,sainath14/libnetwork,sainath14/libnetwork,vdemeester/libnetwork,YujiOshima/libnetwork,abhi/libnetwork,tmakita/libnetwork,allencloud/libnetwork,allencloud/libnetwork,vdemeester/libnetwork,abhi/libnetwork,fcrisciani/libnetwork,mahak/libnetwork,kolyshkin/libnetwork,cpuguy83/libnetwork,msabansal/libnetwork,mahak/libnetwork,medallia/libnetwork,fcrisciani/libnetwork,curtiszimmerman/libnetwork,docker/libnetwork,medallia/libnetwork,curtiszimmerman/libnetwork,abhi/libnetwork