Allow outward_rabbitmq with enable_outward_rabbitmq

outward_rabbitmq is determined  using enable_outward_rabbitmq
property rather than current haproxy_enable_external_vip

Change-Id: Iee096ab50fd4d9f5f3fe05880d0e0a7842c59d0a
Closes-Bug: 1722854

ansible/roles/haproxy/templates/haproxy.cfg.j2

@@ -49,7 +49,6 @@ listen outward_rabbitmq_management
 {% for host in groups['outward-rabbitmq'] %}
   server {{ hostvars[host]['ansible_hostname'] }} {{ hostvars[host]['ansible_' + hostvars[host]['api_interface']]['ipv4']['address'] }}:{{ outward_rabbitmq_management_port }} check inter 2000 rise 2 fall 5
 {% endfor %}
-{% if haproxy_enable_external_vip | bool %}
 
 listen outward_rabbitmq_external
   mode tcp
@@ -62,7 +61,6 @@ listen outward_rabbitmq_external
 {% endfor %}
 {% endif %}
 {% endif %}
-{% endif %}
 
 {% if enable_mongodb | bool %}
 listen mongodb