datapath-windows: Failed initialization for datapath tunnel ports

Tunnel ports are not initialized with the corresponding default port.
The newly allocated vport is not yet initialized and the ovsType
member does not reflect the correct tunnel port type, thus the
transport port destination won't be correctly initialized.

Signed-off-by: Sorin Vinturis <svinturis@cloudbasesolutions.com>
Reported-by: Sorin Vinturis <svinturis@cloudbasesolutions.com>
Reported-at: https://github.com/openvswitch/ovs-issues/issues/88
Acked-by: Eitan Eliahu <eliahue@vmware.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>