Use new Celery task module and got rid of magic keyword handling.

[jezdez]

See http://docs.celeryproject.org/en/2.5/changelog.html#v220-important for more information.

[willkg]

I want to double check this and see if it's backwards compatible with the versions of celery we have in kitsune and fjord. I'll try to do that today or tomorrow.

[jezdez]

Thanks @willkg!

[willkg]

I checked and fjord and kitsune both use celery 2.5.5. Pretty sure I updated playdoh-lib to celery 2.5.5 a while back, too. So that works as a minimum version.

Landed in:

• ccb708b Use new Celery task module and got rid of magic keyword handling.

Also, I updated the CHANGELOG and requirements-django.txt files in:

• 4334a37 Fix celery requirement
• 7e65a8f Update CHANGELOG

That should cover it. Thank you!