Support IoTHub MQTT protocol in device simulator

[rhv-resideo]

Please provide us with the following information:

This issue is for a: (mark with an x)

- [ ] bug report -> please search issues before submitting
- [x] feature request
- [ ] documentation issue or request
- [ ] regression (a behavior that used to work and stopped in a new release)

Minimal steps to reproduce

Any log messages given by the failure

Expected/desired behavior

Support IoTHub MQTT protocol to allow simulating devices that use that protocol.

OS and Version?

N/A

Versions

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