In the RabbitMQ administration the 'default' celery queue is defined as (line 3237 in views.py):
if queue['name'] == u'default':
While actually the name of the queue is defined in "settings.py":
CELERY_DEFAULT_QUEUE = 'default'
I would suggest to change line 3237 as:
if queue['name'] == settings.CELERY_DEFAULT_QUEUE:
Of course you need to import the 'openremproject.settings' first.