Review of AbstractControllerTestBase

Currently we have the abstract class AbstractControllerTestBase to use as the base for simplified controller testing, however due to visibility problems we now have three versions of this class which have also started to diverge slightly.

Before this goes too far we should try and bring this back down to one. Extensions of this class also have certain amount of common functionality.

Maybe also work converting some of this to a 'org.junit.runner.Runner' to avoid the need for inheritance, additional annotations can then be used to define how to configure the controller being tested.