Test vm discovery

tests whether CFME will discover a new vm or a newly archived/deleted vm without being manually refreshed.
Since python has lambdas, I would say this looks more readable (keeping related stuff together):
```python
wait_for(lambda: vm.find_quadicon(True, True, False), num_secs=800, delay=30, handle_exception=True)
```

But this is just my opinion. Maybe @psav has something to say on this?