spec_server properly cleans up after itself with Rails 2.3

[#759 state:resolved milestone:'Next Release']

lib/spec/rails/spec_server.rb

@@ -102,7 +102,12 @@ def run(argv, stderr, stdout)
           )
         )
 
-        dispatcher.cleanup_application if dispatcher.respond_to?(:cleanup_application)
+        if ::ActionController::Dispatcher.respond_to?(:cleanup_application)
+          ::ActionController::Dispatcher.cleanup_application
+        else
+          dispatcher.cleanup_application
+        end
+
       end
 
       def in_memory_database?