[router] Fix typos in adapter's tests
[router] Fix typos in adapter's tests

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