pass the test reporter by reference

this prevents the array from being dumped as a DRbObject so we can
reduce communication with the server.  the reporter should always exist
on the server side, so we don't have to worry about GC

actionpack/test/abstract_unit.rb

@@ -450,7 +450,10 @@ def record reporter, result
       reporter.synchronize { reporter.record result }
     end
 
-    def << o; @queue << o; end
+    def << o
+      o[2] = DRbObject.new(o[2]) if o
+      @queue << o
+    end
     def pop; @queue.pop; end
   end