Feat cod rmq prep
Created by: eesaanatluri
This Pr adds a role cod_rabbitmq_agents_cloud that is run post CoD cluster deploy on the head node so that it has
all the things that RMQ agents expect, otherwise the agents would fail to create users when self-reg web requests start coming in. This will realize all the assumptions made in CoD and bring it on par with prod w.r.t user-creation.