- The `get_energy_usage` query can fail if the device time is not set because the response includes the device time.
- Make `get_energy_usage` an optional query response so the energy module can fall back to getting the power from `get_emeter_data` or `get_current_power` on error.
- Devices on `energy_monitoring` version 1 still fail as they have no additional queries to fall back to.
* Transport tests under tests/transports/
* Protocol tests under tests/protocols/
* IOT tests under iot/
* Plus some minor cleanups, most code changes are related to splitting
up smart & iot tests