tree 2c2792f34d45df2ac184c49a99353960dc3f2766
parent a0dcd47ed9fe52dd9016ae2855b395e7cd6cfec7
author Yuta HIGUCHI <y-higuchi@onlab.us> 1404441940 -0700
committer Gerrit Code Review <gerrit2@gerrit.onos.onlab.us> 1404801139 -0700

Add LinkTuple

- Object to identify a link between ports.
-- Switch -> Dpid, Port -> SwitchPort, Link -> LinkTuple

Implicit assumption here is that even if we allow multiple Links departing from a Port,
their destination will be different ports.

Change-Id: Iad3fb068e5dab0a1b1bea63f257bce2a8e773fb3