Added try/except around cli utils in test_contentview

Discussed in previous pullrequest.
```make_content_view``` throws ```CLIFactoryError``` on error, so it is not necessary to use info to verify if content view was really created, because in that case exception would already have been thrown.
Can this be reformatted? You can probably guess what I'd like to see. (:

    foo({
        'key1': val,
        'key2': val,
    })