[broker] Adjust adapter test as the API method has changed to PUT
[broker] Adjust adapter test as the API method has changed to PUT

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