Fix up integration tests.
Fix up integration tests.

I'd screwed up the NAT machine user data, this fixes that, and also simplifies
by using gom and make actions.

bobtfish/AWSnycast,bobtfish/docker-consul-awsnycast,bobtfish/docker-consul-awsnycast,bobtfish/AWSnycast,bobtfish/docker-consul-awsnycast,bobtfish/AWSnycast