[Do Not Merge] Org & Loc tests UI: Dependent Entities use now APIs

The dependent entities now use APIs to create them.

Now `ui/test_location` and `ui/test_org` now uses `FauxFactory`
module for generate_string, generate_ipaddr, generate_email.
Can we drop the one-value dict here?

```python
@data(
    FauxFactory.generate_string('alpha', 8),
    ...
)
def test_add_user_1(self, user_name):
    ...
```