Adjust test for Rails versions that address CVE-2014-4671

Compare
https://github.com/rails/rails/blob/3-2-stable/actionpack/lib/action_controller/metal/renderers.rb#L94
to
https://github.com/rails/rails/blob/4-0-stable/actionpack/lib/action_controller/metal/renderers.rb#L97

test/serializer_test.rb

@@ -1363,7 +1363,6 @@ class SerializerTest < ActiveModel::TestCase
   def test_inheritance_does_not_used_cached_attributes
     parent = Class.new(ActiveModel::Serializer) do
       attributes :title
-      alias :read_attribute_for_serialization :send
     end
 
     child = Class.new(parent) do
@@ -1371,8 +1370,8 @@ class SerializerTest < ActiveModel::TestCase
     end
 
     data_class = Class.new do
+      include ActiveModel::Serializers::JSON
       attr_accessor :title, :body
-      alias :read_attribute_for_serialization :send
     end
 
     item = data_class.new