nginx/application: Disabled access_log on acme requests

roles/nginx/application/templates/acme.conf

@@ -1,5 +1,5 @@
 location /{{ acme_validation_directory }} {
     root {{ nginx_validation_root_directory }};
-    access_log on;
+    access_log off;
     try_files $uri $uri/ =404;
 }