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.
FIxed issue in last commit: supports controller were not correctly
filling the holes without data.
Fixed duplication in supports and successful supports controller using a
concer.
Successfull supports controller will fill the holes without data in the
same way that supports controller does.
