Implement status
Implement status

This patch add the implementation of status API of the network plugin.
It reports the IP address of the port corresponds to the pod_name.

Signed-off-by: Taku Fukushima <48ddf7139da17a0278f1f27e611ac6b9304f94b2@midokura.com>

tfukushima/midonet-kubernetes,midonet/midonet-kubernetes-prototype,midonet/midonet-kubernetes-prototype,tfukushima/midonet-kubernetes