update rails default files

config/application.rb

@@ -20,7 +20,7 @@ module Danbooru
     config.action_mailer.smtp_settings = {:enable_starttls_auto => false}
     config.action_mailer.perform_deliveries = true
     config.log_tags = [lambda {|req| "PID:#{Process.pid}"}]
-    config.active_support.test_order = :random
+    config.active_record.raise_in_transactional_callbacks = true
   end
 
   I18n.enforce_available_locales = false