Started work on a per-request query cache

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@1268 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

railties/lib/dispatcher.rb

@@ -51,6 +51,7 @@ def reset_application
           Dependencies.remove_subclasses_for(ActiveRecord::Base, ActiveRecord::Observer, ActionController::Base)
         end
 
+        ActiveRecord::Base.connection.clear_query_cache
         Breakpoint.deactivate_drb if defined?(BREAKPOINT_SERVER_PORT)
       end
   end