Fix power-node script to work if more than one node in a cell is off
Fix power-node script to work if more than one node in a cell is off

opennetworkinglab/onos-warden,opennetworkinglab/onos-warden,opennetworkinglab/onos-warden,opennetworkinglab/onos-warden,opennetworkinglab/onos-warden,opennetworkinglab/onos-warden