We need to detect when a resource group or other name is taken

[yaronyg]

This one is a bit tricky. Let's say I name my project test. Eventually when I create a resource group it will include the project name, the DC name, the deployment type and for dev deployments even an ID for the dev. But if someone else happens to pick the same project name then we will have a collision.

The situation is even uglier (although statistically less likely) for individual resources where our cons up names might theoretically collide with someone else's name.

Right now we would just return a blind error and hope the user can figure it out. But ideally we would detect this kind of situation, ideally during the init process, and warn the user.