Code review comment for lp:~julian-edwards/maas/log-celery-exceptions-bug-1184589

Here is the idea I had on how to fix the bug:

Celery messes with the error a bit but it still propagates the full original traceback. What I mean is that if you change the value of error_msg from "Task %(name)s[%(id)s] %(description)s: %(exc)s" to "Task %(name)s[%(id)s] %(description)s: %(traceback)s" in /usr/lib/python2.7/dist-packages/celery/worker/job.py:Request you'll see the full error message when a task fails.

We could do this by either monkey patching celery or registering a new log handler.