MT - fix delete tenant/store to avoid FK constraint violation (for new install)

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@8569 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/node/db/hibernate/HibernateNodeDaoServiceImpl.java

@@ -452,6 +452,9 @@ public class HibernateNodeDaoServiceImpl extends HibernateDaoSupport implements
         list = (List<NodeImpl>)query.list();
         getHibernateTemplate().deleteAll(list);
         
+        store.setRootNode(null);
+        getHibernateTemplate().update(store);
+        
         // delete root node and store
         getHibernateTemplate().delete(rootNode);
         getHibernateTemplate().delete(store);