MAGETWO-69772: Remove wrong '_setup' replace when getting DB connection (2) #9726

 - Merge Pull Request #9726 from jalogut/magento2:fix-db-connection-setup-replace
 - Merged commits:
   1. 3844a40
   2. bb7d3ef

Author: kristof-ringleff

lib/internal/Magento/Framework/App/ResourceConnection/Config.php

@@ -63,9 +63,7 @@ public function getConnectionName($resourceName)
     {
         $this->initConnections();
         $connectionName = \Magento\Framework\App\ResourceConnection::DEFAULT_CONNECTION;
-
-        $resourceName = preg_replace("/_setup$/", '', $resourceName);
-
+ 
         if (!isset($this->_connectionNames[$resourceName])) {
             $resourcesConfig = $this->get();
             $pointerResourceName = $resourceName;