Reorder Studio imports using isort

cms/celery.py

@@ -5,9 +5,12 @@ and auto discover tasks in all installed django apps.
 Taken from: http://celery.readthedocs.org/en/latest/django/first-steps-with-django.html
 """
 from __future__ import absolute_import
+
 import os
+
 from celery import Celery
 from django.conf import settings
+
 from openedx.core.lib.celery.routers import AlternateEnvironmentRouter
 
 # set the default Django settings module for the 'celery' program.