Each node in DB should also hold a field with routes configured.

[fdojurado]

This permits to compute the checksum of routes and see if the controller has the same routes. This minimises the control overhead see paper "Energy-aware routing for software-defined multihop wireless sensor networks".

This DB is populated when the NC routing packets have been acknowledged.

Updated: We now populate the NC routing for each node when generating routes and we set the configure flag when they are acknowledged.