Settings are stored in the database, and so any changes to the settings
done during the tests are automatically rolled back between one test and
the next one.
There were also a few places where we weren't using an `after` block but
changing the setting at the end of the test.
- Add :date_of_birth and :postal_code
- Only display new fields when aplication has configured the Remote
Census API and contains values for fields. Check with Setting Class
methods:
- force_presence_date_of_birth?
- force_presence_postal_code?
The `type: :feature` is automatically detected by RSpec because these
tests are inside the `spec/features` folder. Using `feature` re-adds a
`type: :feature` to these files, which will result in a conflict when we
upgrade to Rails 5.1's system tests.
Because of this change, we also need to change `background` to `before`
or else these tests will fail.
