Bug:#1381980 Vmware Changes 1)Tagging the ARP response with right vlan 2)Identiying the sub interface by doing VIF bridge lookup and by llking into sub interfaces 3)Correcting the VIF_TYPE everywhere 4) Inserting the Vlan tag in linux_rx_handler for ubuntu in the packet 5) Defining IP6OIP to differentiate v6 packets in tunnels

Change-Id: I975aa7a649687fa15b22371ae7842fa3f57c9169