Docker Support

I ran into this issue when I tried to update redirect url for docker distributor. My url didn't match required format and pulp failed on formatting error during the error reporting procedure.

Jun  1 08:09:57 pulp-docker01 pulp: pulp_docker.plugins.distributors.configuration:ERROR: [Error(code='DKR1001', message="The url specified for %(field) is missing a scheme. The value specified is '%(url)'.", required_fields=['field', 'url']), Error(code='DKR1003', message="The url specified for %(field) is missing a path. The value specified is '%(url)'.", required_fields=['field', 'url'])]
Jun  1 08:09:57 pulp-docker01 pulp: pulp.server.async.tasks:INFO: Task failed : [c15209c5-f651-46b2-8755-821914269bd0] : A validation error occurred.
Jun  1 08:09:57 pulp-docker01 pulp: celery.worker.job:CRITICAL: (11788-62848) Task pulp.server.tasks.repository.distributor_update[c15209c5-f651-46b2-8755-821914269bd0] INTERNAL ERROR: TypeError('%d format: a number is required, not str',)
Jun  1 08:09:57 pulp-docker01 pulp: celery.worker.job:CRITICAL: (11788-62848) Traceback (most recent call last):
Jun  1 08:09:57 pulp-docker01 pulp: celery.worker.job:CRITICAL: (11788-62848)   File "/usr/lib/python2.6/site-packages/celery/app/trace.py", line 253, in trace_task
Jun  1 08:09:57 pulp-docker01 pulp: celery.worker.job:CRITICAL: (11788-62848)     I, R, state, retval = on_error(task_request, exc, uuid)
Jun  1 08:09:57 pulp-docker01 pulp: celery.worker.job:CRITICAL: (11788-62848)   File "/usr/lib/python2.6/site-packages/celery/app/trace.py", line 201, in on_error
Jun  1 08:09:57 pulp-docker01 pulp: celery.worker.job:CRITICAL: (11788-62848)     R = I.handle_error_state(task, eager=eager)
Jun  1 08:09:57 pulp-docker01 pulp: celery.worker.job:CRITICAL: (11788-62848)   File "/usr/lib/python2.6/site-packages/celery/app/trace.py", line 85, in handle_error_state
Jun  1 08:09:57 pulp-docker01 pulp: celery.worker.job:CRITICAL: (11788-62848)     }[self.state](task, store_errors=store_errors)
Jun  1 08:09:57 pulp-docker01 pulp: celery.worker.job:CRITICAL: (11788-62848)   File "/usr/lib/python2.6/site-packages/celery/app/trace.py", line 120, in handle_failure
Jun  1 08:09:57 pulp-docker01 pulp: celery.worker.job:CRITICAL: (11788-62848)     task.on_failure(exc, req.id, req.args, req.kwargs, einfo)
Jun  1 08:09:57 pulp-docker01 pulp: celery.worker.job:CRITICAL: (11788-62848)   File "/usr/lib/python2.6/site-packages/pulp/server/async/tasks.py", line 554, in on_failure
Jun  1 08:09:57 pulp-docker01 pulp: celery.worker.job:CRITICAL: (11788-62848)     task_status['error'] = exc.to_dict()
Jun  1 08:09:57 pulp-docker01 pulp: celery.worker.job:CRITICAL: (11788-62848)   File "/usr/lib/python2.6/site-packages/pulp/server/exceptions.py", line 45, in to_dict
Jun  1 08:09:57 pulp-docker01 pulp: celery.worker.job:CRITICAL: (11788-62848)     result['sub_errors'].append(error.to_dict())
Jun  1 08:09:57 pulp-docker01 pulp: celery.worker.job:CRITICAL: (11788-62848)   File "/usr/lib/python2.6/site-packages/pulp/server/exceptions.py", line 39, in to_dict
Jun  1 08:09:57 pulp-docker01 pulp: celery.worker.job:CRITICAL: (11788-62848)     'description': str(self),
Jun  1 08:09:57 pulp-docker01 pulp: celery.worker.job:CRITICAL: (11788-62848)   File "/usr/lib/python2.6/site-packages/pulp/server/exceptions.py", line 95, in __str__
Jun  1 08:09:57 pulp-docker01 pulp: celery.worker.job:CRITICAL: (11788-62848)     msg = self.error_code.message % self.error_data
Jun  1 08:09:57 pulp-docker01 pulp: celery.worker.job:CRITICAL: (11788-62848) TypeError: %d format: a number is required, not str
Jun  1 08:09:57 pulp-docker01 pulp: celery.worker.job:INFO: Task pulp.server.async.tasks._release_resource[476c9148-40bc-4677-8b6e-e225b2446a38] succeeded in 0.0149725959636s: None