Change default to yes because otherwise Varnish is going to fail

defaults/main.yml

@@ -18,7 +18,7 @@ apache_conf_dir: 'conf-available'
 apache_conf_ext: '.conf'
 apache_conf_default_prefix: '000-'
 apache_server_admin: 'webmaster@paragon-es.de'
-apache_server_default: 'no'
+apache_server_default: 'yes'
 apache_server_default_ssl: 'no'
 apache_server_default_aliases: []
 apache_server_default_aliases_redirect: []