Ensure Rails.config.log_level is always set

Rails 4.0.1 takes steps to ensure that Rails.logger.level is equal to Rails.config.log_level. If Rails.config.log_level is not set, an error occurs when trying to look up the log_level constant. 

This change cleans up white space and sets config.log_level to the logger's log_level so Rails doesn't choke later.

The relevant Rails PR is here: https://github.com/rails/rails/pull/11665