Fix haproxy with memcached enabled

Haproxy keeps restarting due memcached servers
are writen in a single line. adds a empty line
in the for so each server is in its line

Change-Id: I763a23de7f70e9ebe543b935b175e675ec774f9a

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

@@ -905,6 +905,7 @@ listen memcached
   bind {{ kolla_internal_vip_address }}:{{ memcached_port }}
 {% for host in groups['memcached'] %}
   server {{ hostvars[host]['ansible_hostname'] }} {{ hostvars[host]['ansible_' + hostvars[host]['api_interface']]['ipv4']['address'] }}:{{ memcached_port }} check inter 2000 rise 2 fall 5 {% if not loop.first %}backup{% endif %}
+
 {% endfor %}
 {% endif %}