Move Rails module to abstract_unit to make test in isolation work

Signed-off-by: NJosé Valim <jose.valim@gmail.com>

actionpack/test/abstract_unit.rb

@@ -38,6 +38,9 @@
 
 require 'pp' # require 'pp' early to prevent hidden_methods from not picking up the pretty-print methods until too late
 
+module Rails
+end
+
 ActiveSupport::Dependencies.hook!
 
 # Show backtraces for deprecated behavior for quicker cleanup.

actionpack/test/controller/base_test.rb

@@ -2,9 +2,6 @@
 require 'logger'
 require 'pp' # require 'pp' early to prevent hidden_methods from not picking up the pretty-print methods until too late
 
-module Rails
-end
-
 # Provide some controller to run the tests on.
 module Submodule
   class ContainedEmptyController < ActionController::Base