Restructure SortColumn Filter

components/device-mgt/org.wso2.carbon.device.mgt.common/src/main/java/org/wso2/carbon/device/mgt/common/PaginationRequest.java

@@ -183,7 +183,7 @@ public class PaginationRequest {
      * @param sortColumns which is separated by a colon(:) and first will be the columnNane and the second will be type ASC or DESC
      * @return sortColumnList as a list of sortColumn
      */
-    public static List<SortColumn> convertToSortColumn(List<String> sortColumns) {
+    public static List<SortColumn> addSortColumn(List<String> sortColumns) {
         List<SortColumn> sortColumnList = new ArrayList<>();
         for (String sortBy: sortColumns) {
             SortColumn sortColumn = new SortColumn();