修正contest_submission逻辑

judge/tasks.py

@@ -0,0 +1,8 @@
+from __future__ import absolute_import, unicode_literals
+from celery import shared_task
+from judge.dispatcher import JudgeDispatcher
+
+
+@shared_task
+def judge_task(submission_id, problem_id):
+    JudgeDispatcher(submission_id, problem_id).judge()