CLOUDSTACK-4750

    use interface wildcard "+" in iptables to cover potential used VLAN interface to allow output on physical interface.

you will see
 0     0 ACCEPT     all  --  *      *       0.0.0.0/0            0.0.0.0/0           PHYSDEV match --physdev-out bond2+ --physdev-is-bridged
instead of
 0     0 ACCEPT     all  --  *      *       0.0.0.0/0            0.0.0.0/0           PHYSDEV match --physdev-out bond2.1234 --physdev-is-bridged

Anthony