Fixes rake tasks in production mode.

lib/bare_migration.rb was not loaded anymore, which was breaking some migrations.
Contrary to running your application in production, a Rake task does not eager load your entire code base. So only if  is false, will the application be eager-loaded in production. And  is set to true in the :environment Rake task.

Solution was given at https://rails.lighthouseapp.com/projects/8994/tickets/2506-models-are-not-loaded-in-migrations-when-configthreadsafe-is-set

Author: Frédéric de Villamil

config/application.rb

@@ -55,6 +55,7 @@ class Application < Rails::Application
   require 'typo_guid'
   ## Required by the plugins themselves.
   # require 'typo_plugins'
+  require 'bare_migration'
   require 'typo_version'
   require 'rails_patch/active_support'
 

config/environments/production.rb

@@ -26,6 +26,7 @@
 
   # Enable threaded mode
   config.threadsafe!
-
+  config.dependency_loading = true if $rails_rake_task
+  
   Migrator.offer_migration_when_available            = true
 end