Improve Testing Set Up

I didn't really like how testing set up was with ARE. Configurations were highly similar, and predefined as zdennis. This is okay if you're him, but I'm not.

This patch cleans up testing configuration a lot. Configurations for all connections can be found in tests/database.yml.sample. A tests/database.yml file will need to be created. You mostly likely just need to do the following and change the default username:

cp tests/database.yml.sample tests/database.yml

You'll also notice that many supporting files, such as tests/boot.rb, and tests/run.rb have been refactored. This should hopefully make them a little more clear in the future for new contributors.