Initial proposal to differentiate sam only and sat only tests

Now tests can use decorators to run/skip tests basead on server modes:
- runIf('sam') - runs only on sam server
- runIf('sat') - runs only on sat server
- no decoractor - runs on all server modes
Do we want to skip tests otherwise?

```python
else:
    return unittest.skip('Test is not for a {0} server.'.format(project))
```