Disable Single Table Inheritance so that the new type column can be used
Merge pull request #70 from alphagov/disable_sti_on_mappings

Disable Single Table Inheritance so that the new type column can be used
Make Bouncer use type instead of http_status (WIP)

- Edit the tests so they specify both http_status and type, so we don't
  get all sorts of failures about not nullable columns.
- Fix some whitespace to line up blocks of its(:foo) { ... }.