Trigger synchronization of "child" pulp node repositories upon modification of parent pulp repository. Performs a sync of a repo when a message with subject: "repo.publish.finish" is consumed on the ampq pulp exchange.
Inspired by Pulp v2's lack of node sync scheduling and a great pulp blog post on the event amqp feature:
http://www.pulpproject.org/2012/11/02/amqp-notifications/
Tell Pulp to publish to AMQP upon completion of a repository "publish".
pulp-admin event listener amqp create --event-type repo.publish.finish --exchange pulp