dao util: PageLink unsorted replaced with ORDER BY is ASC

dao/src/main/java/org/thingsboard/server/dao/DaoUtil.java

@@ -36,6 +36,9 @@ import java.util.stream.Collectors;
 
 public abstract class DaoUtil {
 
+    public static final String DEFAULT_SORT_PROPERTY = "id";
+    public static final Sort DEFAULT_SORT = Sort.by(Sort.Direction.ASC, DEFAULT_SORT_PROPERTY);
+
     private DaoUtil() {
     }
 
@@ -70,7 +73,7 @@ public abstract class DaoUtil {
 
     public static Sort toSort(SortOrder sortOrder, Map<String,String> columnMap) {
         if (sortOrder == null) {
-            return Sort.unsorted();
+            return DEFAULT_SORT;
         } else {
             String property = sortOrder.getProperty();
             if (columnMap.containsKey(property)) {