Launching a device unit without a provider

[e-khalilov]

To run a device without a provider,
you must not specify --provider
in the arguments of the devicehub device / stf device cli command

---

devicehub device \
--serial emulator-5556 \
--screen-port 7404 \
--connect-port 7408 \
--vnc-port 5900 \
--storage-url http://localhost:7100 \
--secret qwe \
--connect-sub tcp://127.0.0.1:7114 \
--connect-push tcp://127.0.0.1:7116