added PARENT_GROUP_ID to the SQL statement

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/AbstractGroupDAOImpl.java

@@ -659,7 +659,7 @@ public abstract class AbstractGroupDAOImpl implements GroupDAO {
         List<DeviceGroup> deviceGroupBuilders = new ArrayList<>();
         try {
             Connection conn = GroupManagementDAOFactory.getConnection();
-            String sql = "SELECT G.ID, G.GROUP_NAME, G.DESCRIPTION, G.OWNER, G.STATUS, G.PARENT_PATH FROM DM_GROUP G " +
+            String sql = "SELECT G.ID, G.GROUP_NAME, G.DESCRIPTION, G.OWNER, G.STATUS, G.PARENT_PATH, G.PARENT_GROUP_ID FROM DM_GROUP G " +
                     "INNER JOIN DM_DEVICE_GROUP_MAP GM ON G.ID = GM.GROUP_ID " +
                     "WHERE GM.DEVICE_ID = ? AND GM.TENANT_ID = ?";
             stmt = conn.prepareStatement(sql);