software/kvm: fix when frontend-additional-instance-guid option doesn't exist

software/kvm/buildout.hash.cfg

@@ -19,11 +19,11 @@ md5sum = 092405e2fba77c22d4dc8cefcab677d8
 
 [template-kvm]
 filename = instance-kvm.cfg.jinja2
-md5sum = b5a2428b9e74462cf3d085adbd457b38
+md5sum = 4e2aecca03c64d0bcff669652b581dba
 
 [template-kvm-cluster]
 filename = instance-kvm-cluster.cfg.jinja2.in
-md5sum = 38feab9631bb6ff624edd4acc0d7833c
+md5sum = 73b09e75d617888f6d84d363c0ada9c5
 
 [template-kvm-resilient]
 filename = instance-kvm-resilient.cfg.jinja2

software/kvm/instance-kvm-cluster.cfg.jinja2.in

@@ -142,7 +142,7 @@ sla-fw_restricted_access = {{ dumps(slapparameter_dict.get('fw-restricted-access
 
 return = 
   url
-{% if frontend_dict.get('frontend-additional-instance-guid', '') %}
+{% if frontend_dict.get('frontend-additional-instance-guid') %}
   url-additional
 {% endif %}
   backend-url
@@ -170,7 +170,7 @@ return =
 {% do monitor_base_url_dict.__setitem__(instance_name, '${' ~ section ~ ':connection-monitor-base-url}') -%}
 {% do publish_dict.__setitem__(instance_name ~ '-backend-url', '${' ~ section ~ ':connection-backend-url}') -%}
 {% do publish_dict.__setitem__(instance_name ~ '-url', '${' ~ section ~ ':connection-url}') -%}
-{% if frontend_dict.get('frontend-additional-instance-guid', '') %}
+{% if frontend_dict.get('frontend-additional-instance-guid') %}
 {% do publish_dict.__setitem__(instance_name ~ '-url-additional', '${' ~ section ~ ':connection-url-additional}') -%}
 {% endif %}
 {% do kvm_instance_dict.__setitem__(instance_name, (use_nat, nat_rules_list)) -%}

software/kvm/instance-kvm.cfg.jinja2

-{% set additional_frontend = (slapparameter_dict.get('frontend-additional-instance-guid', '').strip() != '') %}
+{% set additional_frontend = slapparameter_dict.get('frontend-additional-instance-guid') %}
 {% set enable_http = slapparameter_dict.get('enable-http-server', False) -%}
 {% set use_tap = slapparameter_dict.get('use-tap', True) -%}
 {% set use_nat = slapparameter_dict.get('use-nat', True) -%}