[#3994] Perform a lookup in config dict to get a default value.

ckan/lib/jobs.py

@@ -36,7 +36,7 @@
 log = logging.getLogger(__name__)
 
 DEFAULT_QUEUE_NAME = u'default'
-DEFAULT_JOB_TIMEOUT = config[u'rq.bg_job_timeout']
+DEFAULT_JOB_TIMEOUT = config.get[u'rq.bg_job_timeout', 180]
 
 # RQ job queues. Do not use this directly, use ``get_queue`` instead.
 _queues = {}