[kolla-ansible][rabbitmq] Change to quorum queue

Hi community o/ I've got a little confused about the procedure[1] to change the type of queues to quorum queues. The documentation says that it is needed to stop the services that use Rabbit, but in some tasks in `genconfig` step, some APIs must be up, for example, in[2]. I think the documentation is not too clear, or I just missed something. So, I need to stop services and turn on the APIs? Will it affect the procedure of changing the queue type from classic to quorum? Another question is: when upgrading from Antelope to Caracal, is this procedure mandatory? [1] https://docs.openstack.org/kolla-ansible/latest/reference/message-queues/rab... [2] https://github.com/openstack/kolla-ansible/blob/master/ansible/roles/octavia...