skyring-common : Add role to node model
skyring-common : Add role to node model

Add role to node model

Change-Id: If2d837017f0e726d4d04262225ba938662a2e6ba
Signed-off-by: anmolbabu <3d38fb1e9c5ff2662fc415254efcdfedb95b84d5@gmail.com>

skyrings/skyring-common,skyrings/skyring-common