Retry slim dedicated server

Includes all the changes from slim_dedicated_server except:
1. Does not use PostgreSQL for the tests... for some reason the tests really don't like it.
2. Does not include the change from a4c4bb511d8366cc5fee9dff81767ce6de684f6a ... it causes many tests to fail and the user doesn't expect to be able to upload a form with a name that already exists.
3. Uses testserver.com rather than example.org in two of the tests... for some reason one works but not the other.