docs: @Bean(name = "requestAttributeMergingDao")
      @Qualifier("uPortalInternal")
      public IPersonAttributeDao getRequestAttributeMergingDao() {
          final MergingPersonAttributeDaoImpl rslt = new MergingPersonAttributeDaoImpl();
          rslt.setUsernameAttributeProvider(getUsernameAttributeProvider());
          rslt.setMerger(new ReplacingAttributeAdder());
          final List<IPersonAttributeDao> daos = new ArrayList<>();
          daos.add(getRequestAttributesDao());
          daos.add(getCachingPersonAttributeDao());
          rslt.setPersonAttributeDaos(daos);
          return rslt;
      }