only invoke getIdentityByIP if mac is undefined in ACLAuditLogPlugin.processIptablesLogs
only invoke getIdentityByIP if mac is undefined in ACLAuditLogPlugin.processIptablesLogs

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