[simulators.gateway] Add timeout to channel calls
[simulators.gateway] Add timeout to channel calls

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