Prevent add-apt-repository from running every time
Prevent add-apt-repository from running every time

Change-Id: Id9169a80a59c3de0fb3952955ad2cea502ded2b7
Reviewed-on: https://review.openstack.org/257
Reviewed-by: James E. Blair <e81a02a9d6405977f63a769d9f6ec8ed9d924325@inaugust.com>
Tested-by: Jenkins

open-switch/infra_puppet-jenkins,open-switch/infra_puppet-jenkins