Remove wrong '_setup' replace when getting DB connection. If a custom database resource contains '_setup', default is returned as resourceName does not match after replacement

Author: jalogut

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;