activesupport/json/encoders fix that to_json should call rails_to_json, not just be an alias to the rails_to_json method defined in Object. Fixes #2690

Signed-off-by: Pratik Naik <pratiknaik@gmail.com>

activesupport/lib/active_support/json/encoders/object.rb

@@ -4,5 +4,7 @@ class Object
     ActiveSupport::JSON.encode(instance_values, options)
   end
 
-  alias to_json rails_to_json
+  def to_json(*args)
+    rails_to_json(*args)
+  end
 end