Fetch the correct user model in SQLRestAuth.setup.

Author: davexunit

lib/casserver/authenticators/sql_rest_auth.rb

@@ -52,6 +52,7 @@ def validate(credentials)
 
   def self.setup(options)
     super(options)
+    user_model = user_models[options[:auth_index]]
     user_model.__send__(:include, EncryptedPassword)
   end