Install the udp-relay on prod-rpc.khanacademy.org

Test Plan:
Will test once this is committed, and I can pull it onto prod-rpc and
run setup.sh and see if the daemons are up and running.

Reviewers: chris

Reviewed By: chris

Subscribers: alan

Differential Revision: http://phabricator.khanacademy.org/D8288