Include information from Json body in the stream name created by the MQTT Adapter
As a system admin I would like to send mqtt messages from multiple devices to a single topic on an mqtt broker. Each message would contain data for the device along with a field to say which device the data has come from. Then I would like to use the mqtt adapter to read in the messages from this topic and to split the data into different streams depending on which device is referenced in the message. This is preferable to sending to individual topics per device since it would require less configuration on the mqtt broker since there could be 1000s of devices. In addition, I am working with a vendor that sends their data in this format.