Asymmetric routing / userdefined route on deployment

[RobertAmdax]

I am happily using the AKS construction helper - awesome work!
One issue we are running into is restricting egress through a central Azure Firewall, which causes asymmetric routing. Like described here
The solution would be deploying AKS with the --outbound-type userDefinedRouting option on deployment.
Does anyone have a hint on how to do this with the AKS construction helper?
Thanks,
Robert

[Gordonby]

Closed by #550