Do a complete backup for updates

The backup cron job ensures backups every 4 hours which simply does
a 'box' backup listing. If we do only a 'box' backup during update,
this means that this cron job skips doing a backup and thus the apps
are not backed up.

This results in the janitor on the CaaS side complaining that the
app backups are too old.

Since we don't stop apps anymore during updates, it makes sense
to simply backup everything for updates as well. This is probably
what the user wants anyway.

src/cloudron.js

@@ -494,7 +494,7 @@ function doUpdate(boxUpdateInfo, callback) {
 
     progress.set(progress.UPDATE, 5, 'Create box backup for update');
 
-    backupBox(function (error) {
+    backupBoxAndApps(function (error) {
         if (error) return updateError(error);
 
         // fetch a signed sourceTarballUrl