Silence git cron-spam.
Silence git cron-spam.

Change-Id: I55bcda7e2fec9939fd278a4b314ee45f45dded10
Reviewed-on: https://review.openstack.org/10958
Approved: Monty Taylor <37c07a49ee3d5191376d758eb1d8298b34456b8e@inaugust.com>
Reviewed-by: Monty Taylor <37c07a49ee3d5191376d758eb1d8298b34456b8e@inaugust.com>
Tested-by: Jenkins

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