ISTWCMS-3825 Add startTransaction for delete aggregator_feed and...

ISTWCMS-3825 Add startTransaction for delete aggregator_feed and aggregator_item for the given feed id when uninstall module

uw_sites_all.install

@@ -32,6 +32,10 @@ function uw_sites_all_install() {
  * Implements hook_uninstall().
  */
 function uw_sites_all_uninstall() {
+
+  // The transaction opens here.
+  $transaction = \Drupal::database()->startTransaction();
+
   $title = "Web-resources news";
   $fid = db_query('SELECT fid FROM {aggregator_feed} WHERE title = :title', array(':title' => $title))->fetchCol();
   if (!empty($fid)) {