Add admin tests

[thclark]

Feature request

Use Case

We recently created a regression error in which the test server wouldn't run (the routing was incorrect) and the admin panel couldn't render (a db storage field that had been used as an example was missing). This broken solution was released.

Current state

There are no tests to ensure the test server boots as normal and to ensure that the key views in the admin run correctly.

Proposed Solution

Add tests for the main admin views.