Don't automatically run meetbot/statusbot.

Change-Id: I8facfa48113d27fd18e700730a7a27a666bc2c40
Reviewed-on: https://review.openstack.org/28059
Reviewed-by: Jesse Keating <jesse.keating@rackspace.com>
Reviewed-by: Jeremy Stanley <fungi@yuggoth.org>
Reviewed-by: Khai Do <zaro0508@gmail.com>
Approved: Clark Boylan <clark.boylan@gmail.com>
Reviewed-by: Clark Boylan <clark.boylan@gmail.com>
Tested-by: Jenkins