大屏看板相关bug修复

modules/thing/src/main/java/com/thing/dashboard/dto/IotDashboardGroupDTO.java

@@ -73,13 +73,13 @@ public class IotDashboardGroupDTO implements Serializable {
 	private Long creator;
 
 	@Schema(description = "创建时间")
-	private Date createDate;
+	private Long createDate;
 
 	@Schema(description = "更新者")
 	private Long updater;
 
 	@Schema(description = "更新时间")
-	private Date updateDate;
+	private Long updateDate;
 
 	@Schema(description = "配置菜单信息")
 	private SysMenuDTO sysMenuDTO;