[dutycycle] Implements lookup method in dutyManager
[dutycycle] Implements lookup method in dutyManager

mgranberry/ttn,jvanmalder/ttn,LoRaWanSoFa/ttn,TheThingsNetwork/ttn,jvanmalder/ttn,mgranberry/ttn,TheThingsNetwork/ttn,jvanmalder/ttn,TheThingsNetwork/ttn,LoRaWanSoFa/ttn,mgranberry/ttn