add alias for booth

Booth can be replaced with any alias by replacing it in alias.en.yml. This change is introduced as some events do not use booth but uses other words such as stand.

spec/spec_helper.rb

@@ -121,6 +121,10 @@ RSpec.configure do |config|
   #     save_and_open_page
   #   end
   # end
+
+  # use the config to use
+  # t('some.locale.key') instead of always having to type I18n.t
+  config.include AbstractController::Translation
 end
 
 OmniAuth.config.test_mode = true