In keeping with the philosophy of the RESTProxy plugin, L3 extension calls
are processed (CRUD of logical resources) and the state changes are proxied
to a backend controller.
A configuration variable specific to the RESTProxy plugin is being added
to identify that particular Quantum server's ID.
blueprint quantum-floodlight-bigswitch-l3
Change-Id: I24be02cd836352497fe5b1e7622d138e0c816377