Issue #2798129 by memtkmcc: Run extra Verify via frontend during Import task (BOA unfork)

platform/import.provision.inc

@@ -42,7 +42,12 @@ function drush_provision_drupal_post_provision_import() {
     // Do not automatically save the drushrc at the end of the command.
     drush_set_option('provision_save_config', false);
 
+    // We still run this extra backend sub-task to properly register packages etc.
     provision_backend_invoke(d()->name, 'provision-verify');
+    sleep(5); // A small trick to avoid high load and race conditions.
+
+    // We run this extra verify via frontend to avoid issue #1004526.
+    provision_backend_invoke('@hostmaster', 'hosting-task', array(d()->name, 'verify'), array('force' => TRUE));
 
     drush_include_engine('drupal', 'cron_key');