fix _connect hang when not registered device

[adamiwaniuk]

Thanks for this project! I found this when trying to implement control over my ventilation via Google Home and this is very helpful.
While running aiocomfoconnect register it hangs on my machine.
I think this is bug introduced while implementing reconnect logic.
When exception ComfoConnectNotAllowed is thrown, it will be dropped and await connected will hang until time out.
And then code

except ComfoConnectNotAllowed:
        # We probably are not registered yet...
        try:
            await comfoconnect.cmd_register_app(uuid, name, pin)

will not be executed, so app will never register.
After this fix I can register and use this module properly.

[michaelarnauts]

This makes sense! Thanks a lot for the fix!