fixed bug that policy data may be altered by applyPolicy function
fixed bug that policy data may be altered by applyPolicy function

that may mislead the system that the policy was updated, but actually
it was not

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