apache-fontend: fix cache_access variable for master unicode

software/apache-frontend/apache-slave-list.cfg.in

 {% set cached_server_dict = {} -%}
 {% set part_list = [] -%}
+{% set cache_access = "http://%s:%s" % (local_ipv4, cache_port) -%}
 {% set generic_instance_parameter_dict = {'cache_access': cache_access,} -%}
 [jinja2-template-base]
 recipe = slapos.recipe.template:jinja2

software/apache-frontend/apache-yakari.cfg.in

 {% set cached_server_dict = {} -%}
 {% set part_list = [] -%}
+{% set cache_access = "http://%s:%s" % (local_ipv4, cache_port) -%}
 {% set TRUE_VALUES = ['y', 'yes', '1', 'true'] -%}
 {% set generic_instance_parameter_dict = {'cache_access': cache_access,} -%}
 [jinja2-template-base]

software/apache-frontend/instance.cfg

@@ -121,8 +121,9 @@ extra-context =
     key rewrite_cached_configuration apache-configuration:cached-rewrite-file
     key custom_ssl_directory apache-directory:vh-ssl
     key apache_log_directory apache-directory:slave-log
+    key local_ipv4 instance-parameter:ipv4-random
+    key cache_port apache-configuration:cache-port
     raw empty_template ${template-empty:target}
-    raw cache_access http://$${instance-parameter:ipv4-random}:$${apache-configuration:cache-port}
     raw template_slave_configuration ${template-slave-configuration:target}
     raw template_rewrite_cached ${template-rewrite-cached:target}
 
@@ -142,8 +143,9 @@ extra-context =
     key custom_ssl_directory apache-directory:vh-ssl
     key template_slave_configuration dynamic-virtualhost-template-slave:rendered
     key apache_log_directory apache-directory:slave-log
+    key local_ipv4 instance-parameter:ipv4-random
+    key cache_port apache-configuration:cache-port
     raw empty_template ${template-empty:target}
-    raw cache_access http://$${instance-parameter:ipv4-random}:$${apache-configuration:cache-port}
     raw template_rewrite_cached ${template-rewrite-cached:target}
 
 [dynamic-default-template-slave-list]
@@ -161,9 +163,10 @@ extra-context =
     key rewrite_cached_configuration apache-configuration:cached-rewrite-file
     key custom_ssl_directory apache-directory:vh-ssl
     key apache_log_directory apache-directory:slave-log
+    key local_ipv4 instance-parameter:ipv4-random
+    key cache_port apache-configuration:cache-port
     raw template_slave_configuration ${template-default-slave-virtualhost:target}
     raw empty_template ${template-empty:target}
-    raw cache_access http://$${instance-parameter:ipv4-random}:$${apache-configuration:cache-port}
     raw template_rewrite_cached ${template-rewrite-cached:target}
 
 [dynamic-virtualhost-template-slave]