I believe it's cmn_rota_escalation_set.list

I'm not positive because we are not using the escalations in the shifts/schedules; we are using SLAs to notify Team Leads/Managers if an alert isn't acknowledged. So - we haven't had to promote those to our test instance. I'll be interested to know if that does work for you because it's possible that we will move that direction or use the escalation in some form.