Since we now support zaqar:// publisher, Enhance the description to indicate
how to set the zaqar publisher.
Change-Id: Ib7eba98d199fade2346620672e33b74686d4685b
description: >
A list of publishers to put in event_pipeline.yaml. When the
collector is used, override this with notifier:// publisher.
+ If zaqar is enabled, you can also publish to a zaqar queue
+ by including "zaqar://?queue=queue_name" in this list.
Set ManageEventPipeline to true for override to take effect.
type: comma_delimited_list
ManagePipeline: