Update iothub_client_amqp_internal.h
Update iothub_client_amqp_internal.h

Inside the message sent to the CBS endpoint, there is a different token type if compared with C# implementation.
The C client uses "servicebus.windows.net:sastoken" as like all Service Bus services (queues, topics/subscriptions and event hubs).
The C# client uses "azure-devices.net:sastoken".
The two clients work fine (why?) but I think that the right token type should be "azure-devices.net:sastoken" for both.
faister/azure-iot-sdks,kevinledinh/azure-iot-sdks,oriolpinol/azure-iot-sdks,Eclo/azure-iot-sdks,avranju/azure-iot-sdks,avranju/azure-iot-sdks,emirotin/resin-azure-iot-sample,andrew-buckley/azure-iot-sdks,dominicbetts/azure-iot-sdks,dominicbetts/azure-iot-sdks,faister/azure-iot-sdks,dominicbetts/azure-iot-sdks,Eclo/azure-iot-sdks,damonbarry/azure-iot-sdks-1,andrew-buckley/azure-iot-sdks,andrew-buckley/azure-iot-sdks,oriolpinol/azure-iot-sdks,oriolpinol/azure-iot-sdks,avranju/azure-iot-sdks,emirotin/resin-azure-iot-sample,oriolpinol/azure-iot-sdks,faister/azure-iot-sdks,oriolpinol/azure-iot-sdks,damonbarry/azure-iot-sdks-1,kevinledinh/azure-iot-sdks,Eclo/azure-iot-sdks,avranju/azure-iot-sdks,avranju/azure-iot-sdks,faister/azure-iot-sdks,dominicbetts/azure-iot-sdks,damonbarry/azure-iot-sdks-1,andrew-buckley/azure-iot-sdks,emirotin/resin-azure-iot-sample,Eclo/azure-iot-sdks,Eclo/azure-iot-sdks,emirotin/resin-azure-iot-sample,andrew-buckley/azure-iot-sdks,dominicbetts/azure-iot-sdks,damonbarry/azure-iot-sdks-1,oriolpinol/azure-iot-sdks,dominicbetts/azure-iot-sdks,damonbarry/azure-iot-sdks-1,dominicbetts/azure-iot-sdks,avranju/azure-iot-sdks,kevinledinh/azure-iot-sdks,kevinledinh/azure-iot-sdks,kevinledinh/azure-iot-sdks,Eclo/azure-iot-sdks,andrew-buckley/azure-iot-sdks,kevinledinh/azure-iot-sdks,kevinledinh/azure-iot-sdks,avranju/azure-iot-sdks,faister/azure-iot-sdks,Eclo/azure-iot-sdks,emirotin/resin-azure-iot-sample,andrew-buckley/azure-iot-sdks,kevinledinh/azure-iot-sdks,damonbarry/azure-iot-sdks-1,oriolpinol/azure-iot-sdks,damonbarry/azure-iot-sdks-1,dominicbetts/azure-iot-sdks,faister/azure-iot-sdks,emirotin/resin-azure-iot-sample,emirotin/resin-azure-iot-sample,damonbarry/azure-iot-sdks-1,Eclo/azure-iot-sdks,Eclo/azure-iot-sdks,faister/azure-iot-sdks,oriolpinol/azure-iot-sdks,kevinledinh/azure-iot-sdks