Make it so `cap setup` doesn't always try to do `db:create`

[mackermedia]

Was having an issue with trying to setup an application with a database that already existed.

This line is the reason why: https://github.com/vigetlabs/viget-deployment/blob/master/lib/viget/deployment/recipes/database.rb#L3

[mackermedia]

Nvm. Cap output being red was the culprit.