Present the gateway itself before gateway child sensors

[davidedmundson]

This fixes child nodes working under home-assistant

[mysensors-jenkins]

Core tests successful.
A member of the MySensors core team can ask me to verify this pull request more extensively by telling me "jenkins, build examples please".
But remember that I will only listen if you name me with a capital 'J'.

[henrikekblad]

Could this be fixed in HomeAssistant instead? A bit worried how other controllers would react if we introduced this message.

[davidedmundson]

Other controllers will need it too.

Gateways having child sensors is new.
Its mysensors "breaking" behavior by now having sensors without a presented sensor.

This patch brings the serial API to be the same as previous releases from the POV of the controller.

[henrikekblad]

Hmm, true. It should probably be defined as a repeater anyhow. Could you update this?

[mysensors-jenkins]

Core tests successful.
A member of the MySensors core team can ask me to verify this pull request more extensively by telling me "jenkins, build examples please".
But remember that I will only listen if you name me with a capital 'J'.

[henrikekblad]

When thinking a bit more it should probably be:

#if defined(MY_REPEATER_FEATURE)
   present(NODE_SENSOR_ID, S_ARDUINO_REPEATER);
#else
   present(NODE_SENSOR_ID, S_ARDUINO_NODE);
#endif

[henrikekblad]

Fixed in #426