Added IP address of the OF switch to flow-node

- adds IP address to flow capable node
- adds routed RPC:
	get-node-ip-address - returns IP address of a flow capable node

Change-Id: Ie1f3459ddbe898cc2aa8cc488437666c566246d6
Signed-off-by: Martin Sunal <msunal@cisco.com>
Merge "Added IP address of the OF switch to flow-node"