Add status checker for staging projects
To see if a staging project is up to acceptance, we need:
- all packages need to be succeeded or excluded in all repositories
- the repository state should not be "dirty"
- all requests need to be out of review
- the TEST-DVD needs to have been tested - for now we need to do some guessing on the openqa's result.json
if a package failed to build, we need to know as early as possible