mountPoint is only set for 'mountpoint' (unmanaged)

When restoring, mountPoint field is expected for managed mount points

src/apps.js

@@ -2063,13 +2063,12 @@ async function importApp(app, data, auditSource) {
     // TODO: make this smarter to do a read-only test and check if the file exists in the storage backend
     if (backupConfig) {
         if (mounts.isManagedProvider(backupConfig.provider)) {
-            backupConfig.mountPoint = `/mnt/appimport-${app.id}`;
             error = mounts.validateMountOptions(backupConfig.provider, backupConfig.mountOptions);
             if (error) throw error;
 
             const mountObject = { // keep this in sync with the import code in apptask
                 name: `appimport-${app.id}`,
-                hostPath: backupConfig.mountPoint,
+                hostPath: `/mnt/appimport-${app.id}`,
                 mountType: backupConfig.provider,
                 mountOptions: backupConfig.mountOptions
             };