Require rubygems instead of lifo's rails

Author: lifo

test/abstract_unit.rb

@@ -1,6 +1,4 @@
-# [TODO] Replace with requiring rails gem after we release 2.2
-$: << '/Users/lifo/commit-rails/rails/actionpack/lib'
-
+require 'rubygems'
 require 'test/unit'
 require 'action_controller'
 require 'action_controller/test_process'