use array concat instead of push to avoid stack overflow in FlowAggrTool.addSumFlow
use array concat instead of push to avoid stack overflow in FlowAggrTool.addSumFlow

firewalla/firewalla,MelvinTo/firewalla,firewalla/firewalla,firewalla/firewalla,MelvinTo/firewalla,MelvinTo/firewalla,firewalla/firewalla,MelvinTo/firewalla,MelvinTo/firewalla,firewalla/firewalla