SSDM-13195 : Hibernate fixes, modifying PE layer to use DAO for parents/children

openbis/source/java/ch/systemsx/cisd/openbis/generic/server/dataaccess/db/SampleRelationshipDAO.java

@@ -43,7 +43,7 @@ public class SampleRelationshipDAO extends AbstractGenericEntityDAO<SampleRelati
     private RelationshipTypePE getParentChildRelationship()
     {
         final DetachedCriteria criteria = DetachedCriteria.forClass(RelationshipTypePE.class);
-        criteria.add(Restrictions.eq("code", BasicConstant.PARENT_CHILD_INTERNAL_RELATIONSHIP));
+        criteria.add(Restrictions.eq("simpleCode", BasicConstant.PARENT_CHILD_INTERNAL_RELATIONSHIP));
         List<RelationshipTypePE> cast = cast(getHibernateTemplate().findByCriteria(criteria));
         return cast.get(0);
     }