vm scripts look for temp cloud config

This re-enables the `ETCD` discovery service, while avoiding the problem with introducing merge conflicts.

@danmcginnis @MHarrison72 @Roman215 @zeldanerd24 : This requires some modifications to your setup. Once you pull the changes from master and update your work branches/etc, you need to create a file called `cloud-config-tmp.yaml` in `scripts/dev-config`. It needs to have the same content as the regular `cloud-config.yaml`.