Fix authority-related bugs

- migration patch uses non-public authority service
- root authority query ignores deleted nodes
- avoid exception for getContainingAuthorities("System")
- update unit test to cope with corrected EMAIL_CONTRIBUTORS group and slight difference in behaviour with root authorities

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@14609 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

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

@@ -2787,7 +2787,8 @@ public class HibernateNodeDaoServiceImpl extends HibernateDaoSupport implements
                         HibernateNodeDaoServiceImpl.QUERY_GET_NODES_WITHOUT_PARENT_ASSOCS_OF_TYPE).setString(
                         "storeProtocol", storeRef.getProtocol()).setString("storeIdentifier", storeRef.getIdentifier())
                         .setLong("nodeTypeQNameID", qnameDAO.getOrCreateQName(nodeTypeQName).getFirst()).setLong(
-                                "assocTypeQNameID", qnameDAO.getOrCreateQName(assocTypeQName).getFirst());
+                                "assocTypeQNameID", qnameDAO.getOrCreateQName(assocTypeQName).getFirst()).setBoolean(
+                                "isDeleted", false);
                 DirtySessionMethodInterceptor.setQueryFlushMode(session, query);
                 return query.scroll(ScrollMode.FORWARD_ONLY);
             }