add some tests

oj/__init__.py

@@ -6,9 +6,4 @@
 \___/  |_| |_||_||_||_| |_| \___|  \___/  \__,_| \__,_| \__, | \___| |_.__/  \__, |  \__, | \__,_| \__,_|
                                                         |___/                |___/      |_|
 https://github.com/QingdaoU/OnlineJudge
-"""
-from __future__ import absolute_import
-
-# This will make sure the app is always imported when
-# Django starts so that shared_task will use this app.
-from .celery import app as celery_app
+"""