flask_app: 增加邮件服务

Signed-off-by: Binren Zhnag <zhangbr@elab-plus.com>

flask_app.py

@@ -5,6 +5,7 @@ from test_info import TestInfo
 from tongce import TongCe
 from apscheduler_elab import Config
 from flask_apscheduler import APScheduler
+from email_util import EmailUtil
 import decimal
 from report_push import ReportPush