ipvlan: wrong name was used during link creation

Instead of temp (random) name, the final name (e.g. eth0)
was used during link creation. This would collide on hosts
that already had the an interface with such a name.

plugins/main/ipvlan/ipvlan.go

@@ -86,7 +86,7 @@ func createIpvlan(conf *NetConf, ifName string, netns *os.File) error {
 	mv := &netlink.IPVlan{
 		LinkAttrs: netlink.LinkAttrs{
 			MTU:         conf.MTU,
-			Name:        ifName,
+			Name:        tmpName,
 			ParentIndex: m.Attrs().Index,
 			Namespace:   netlink.NsFd(int(netns.Fd())),
 		},