OO-623: fix 2 metamorphic queries

src/main/java/org/olat/group/manager/BusinessGroupDAO.java

@@ -477,9 +477,9 @@ public class BusinessGroupDAO {
 		if(params.getManaged() != null) {
 			where = where(query, where);
 			if(params.getManaged().booleanValue()) {
-				query.append("bgi.managedFlags is not null");
+				query.append("bgi.managedFlagsString is not null");
 			} else {
-				query.append("bgi.managedFlags is null");
+				query.append("bgi.managedFlagsString is null");
 			}
 		}
 		

src/main/java/org/olat/repository/RepositoryManager.java

@@ -1637,9 +1637,9 @@ public class RepositoryManager extends BasicManager {
 		
 		if(params.getManaged() != null) {
 			if(params.getManaged().booleanValue()) {
-				query.append(" and v.managedFlags is not null");
+				query.append(" and v.managedFlagsString is not null");
 			} else {
-				query.append(" and v.managedFlags is null");
+				query.append(" and v.managedFlagsString is null");
 			}
 		}