Fix RPM warnings, cleanup
Fix RPM warnings, cleanup

This patch fixes the Ansible warnings about using RPM and it cleans
up a "when" to make it easier to read.

Change-Id: Iff27f90654a5b21a7e59d7cca4ed6e83cde74716

openstack/openstack-ansible-rabbitmq_server,openstack/openstack-ansible-rabbitmq_server