fix(接口测试): 场景定时任务执行,通知报错

--bug=1043872 --user=陈建星 定时任务执行场景，发送通知后台报空指针 https://www.tapd.cn/55049933/s/1548525

backend/services/api-test/src/main/java/io/metersphere/api/job/ApiScenarioScheduleJob.java

@@ -64,6 +64,7 @@ public class ApiScenarioScheduleJob extends BaseScheduleJob {
         taskInfo.getRunModeConfig().setPoolId(apiRunModeConfigDTO.getPoolId());
         taskInfo.setSaveResult(true);
         taskInfo.setRealTime(false);
+        taskInfo.setUserId(userId);
         taskInfo.getRunModeConfig().setEnvironmentId(parseParam.getEnvironmentId());
         taskItem.setRequestCount(tmpParam.getRequestCount().get());