JdbiFactory throws red-herring ClassNotFoundException when the application is not given config file path

[shawnrc]

I'm not sure what layer this issue exists on (maybe actually Dropwizard), but after switching to the DW-managed Jdbi factory process, the server emits a really misleading set of exceptions when you forget to pass it the path to the config file. This is because the call to JdbiFactory.build() fails since it's missing the necessary DataSourceFactory info stored within.

Ideally, Dropwizard should figure this out for us and emit a helpful error, but alas, for now I think it'd be best to just handle the exception in a user-friendly way.