Use rpc_transport_url in blazar

Change-Id: Ifc0f1e356dd6a5c194d00ab20f3122d17c7223cc

ansible/roles/blazar/templates/blazar.conf.j2

@@ -3,7 +3,7 @@ debug = {{ blazar_logging_debug }}
 
 log_dir = /var/log/kolla/blazar
 
-transport_url = rabbit://{% for host in groups['rabbitmq'] %}{{ rabbitmq_user }}:{{ rabbitmq_password }}@{{ hostvars[host]['ansible_' + hostvars[host]['api_interface']]['ipv4']['address'] }}:{{ rabbitmq_port }}{% if not loop.last %},{% endif %}{% endfor %}
+transport_url = {{ rpc_transport_url }}
 
 host = {{ api_interface_address }}
 port = {{ blazar_api_port }}