stringify values for ActiveAdmin authorization_adapter in in initiali…

…zers

config/initializers/active_admin.rb

@@ -63,7 +63,7 @@
   # method in a before filter of all controller actions to
   # ensure that there is a user with proper rights. You can use
   # CanCanAdapter or make your own. Please refer to documentation.
-  config.authorization_adapter = AdminAuthAdapter
+  config.authorization_adapter = 'AdminAuthAdapter'
 
   # In case you prefer Pundit over other solutions you can here pass
   # the name of default policy class. This policy will be used in every
@@ -311,7 +311,7 @@
   #
   # config.order_clause = MyOrderClause
   config.namespace :editor do |editor|
-    editor.authorization_adapter = EditorAuthAdapter
+    editor.authorization_adapter = 'EditorAuthAdapter'
     editor.site_title = "Community Editor Portal"
     editor.root_to = 'pages#index'
     editor.comments_menu = false