Fix tests on 1.8.6

activeresource/lib/active_resource/base.rb

@@ -3,6 +3,7 @@ require 'active_support/core_ext/class/inheritable_attributes'
 require 'active_support/core_ext/module/attr_accessor_with_default'
 require 'active_support/core_ext/module/delegation'
 require 'active_support/core_ext/module/aliasing'
+require 'active_support/core_ext/object/misc'
 require 'set'
 
 module ActiveResource

activeresource/test/base/load_test.rb

@@ -1,6 +1,7 @@
 require 'abstract_unit'
 require "fixtures/person"
 require "fixtures/street_address"
+require 'active_support/core_ext/symbol'
 
 module Highrise
   class Note < ActiveResource::Base