Sync-up with latest 7.9 changes on old archetype

The "new" archetype (https://svn.onehippo.org/repos/hippo/hippo-cms7/archetype/trunk) needs to be kept in sync with the old one. There's a sync-marker.txt file next to the root POM, which indicates up to which point the latest sync went. When sync-ing again, don't forget to update it.