RabbitMQ: Migrate environment/volumes definition
RabbitMQ: Migrate environment/volumes definition

This change effectively migrates environment and volumes used by
rabbitmq pacemaker resource from puppet-tripleo to tht, so that we can
reduce amount of logics we implement in puppet layer.

Depends-on: https://review.opendev.org/854943
Change-Id: I5c895c6ad76d635f574824161f612eb102c673f4

openstack/puppet-tripleo,openstack/puppet-tripleo,openstack/puppet-tripleo