Currently, when Traffic Router doesn't have certificates for delivery services, it sleeps for a hard-coded 1 second and tries again, infinitely.
We should consider making the time interval a config, to allow dynamically changing the time between checks.
We may decide this is too small to be worth another config param. But we should think about it and make a decision.
If it is a config, it should probably be a static value, not exponential backoff, because there's no network activity. This checks a data object which is fetched by another thread, so the cost is only a tiny amount of CPU.