Provide a script to create a workspace folder and copy the terraform over

[seansund]

In the IBM Cloud infrastructure release we provided a setup.sh script that copied the terraform into a new workspace/ folder. There were at least two reasons for doing this:

1. It separated the immutable terraform content in the repo from the working copy of everything. That way changes don't accidentally get pushed back into the repo. It also means that new updates could be brought down via git pull without immediately applying those changes to the working copy
2. Multiple workspace folders could be created to preserve the configuration and state for different deployments

In the past the setup.sh script did a lot of things but in this case we could simplify the logic to just copying the modules into a workspace folder.

[mjperrins]

in FS Cloud we used setup-workspace shall we agree on setup.sh ?