datapath-windows: Update port property.

Update Hyper-V port properties on NDIS property port set callback.
Driver update the port friendly name in its internal table.
Since the NIC Create callback won't be called after we need to maintain the
NIC and THE OVS states of the Vport.

Setting a new friendly name was tested in the following states:
[1] The port is disconnected
[2] The port is connected but not OVS user mode counter port
[3] The port is connected and an OCS port associated with it

Signed-off-by: Eitan Eliahu <eliahue@vmware.com>
Acked-by: Nithin Raju <nithin@vmware.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>