Content view register (after rebase)

By default, `LifecycleEnviroinment().create()` finds a correct value for `prior` for you. Thus, there is no reason to explicitly search for the 'Library' lifecycle environment. The above can be refactored down to this:

```python
new_org = Organization().create()
new_lifecycle = LifecycleEnvironment(organization=new_org['id']).create()
```