refactor: make variable as dns hostname more clear

functions

@@ -145,6 +145,6 @@ service_password() {
 service_url() {
   local SERVICE="$1"
   local PASSWORD="$(service_password "$SERVICE")"
-  local SERVICE_ALIAS="$(service_alias "$SERVICE")"
-  echo "$PLUGIN_SCHEME://$SERVICE:$PASSWORD@$SERVICE_ALIAS:${PLUGIN_DATASTORE_PORTS[0]}"
+  local SERVICE_DNS_HOSTNAME="$(service_dns_hostname "$SERVICE")"
+  echo "$PLUGIN_SCHEME://$SERVICE:$PASSWORD@$SERVICE_DNS_HOSTNAME:${PLUGIN_DATASTORE_PORTS[0]}"
 }