The gitea-lb, zuul-lb, and zookeeper deployments rely on statsd sidecar
images to collect and report metrics to statsd. We should trigger the
infra-prod deployment jobs for these services when those images update.
We make a noop timestamp update to each Dockerfile to exercise that
update via this change.
Change-Id: I1ffd57d386812560c72861bf66a10c1822a25217
f8bfb04130