Uplink network spec
Uplink network spec

Write the spec for the MidoNet plugin implementation of the
provider network Neutron extension and modification to the
port binding extension API to integrate the uplink network
configuration of MidoNet in Neutron.

Change-Id: I3423d981f0cdaeff98c0ec22043be94ee8a2e39e
Fixes: MNP-72

yamt/networking-midonet,yamt/networking-midonet