Update synchronous tasks to no longer use the CallRequest
Merge pull request #755 from pulp/barnabycourt-US2512-sync-async-task-conversion

US2512 sync task conversion
adding monthly_maintenance pulp task to celerybeat schedule
removing monthly maintenance task from cron job since it is added to the celerybeat instead
supporting celery 3.1's new way of expressing mongo config
Merge pull request #761 from pulp/mhrivnak-mongo-backend

supporting celery 3.1's new way of expressing mongo config
Merge pull request #760 from pulp/skarmark-celerybeat

adding monthly_maintenance pulp task to celerybeat schedule and removing it from the cron job
Merge changes from distributed-tasks