clean empty lines in config

Change-Id: Ic7765d9432fe24a73f67e23e86d601668ead27f8
diff --git a/keepalived/files/keepalived.conf b/keepalived/files/keepalived.conf
index a7f90c4..d183bae 100644
--- a/keepalived/files/keepalived.conf
+++ b/keepalived/files/keepalived.conf
@@ -2,8 +2,8 @@
 
 ! Configuration File for keepalived
 
-{% for instance_name, instance in cluster.instance.iteritems() %}
-{% if instance.get('enabled', True) %}
+{%- for instance_name, instance in cluster.instance.iteritems() %}
+{%- if instance.get('enabled', True) %}
 vrrp_instance {{ instance_name }} {
     {%- if instance.get('nopreempt', True) %}
     state BACKUP
@@ -35,5 +35,5 @@
         {%- endif %}
     }
 }
-{% endif %}
-{% endfor %}
+{%- endif %}
+{%- endfor %}