magento-engcom/magento2ce#2639: Blacklisted elasticsearch client for phpcpd

Author: sivaschenko

dev/tests/static/testsuite/Magento/Test/Php/_files/phpcpd/blacklist/common.txt

@@ -208,4 +208,5 @@ Magento/InventoryGroupedProductIndexer/Indexer
 Magento/Customer/Model/FileUploaderDataResolver.php
 Magento/Customer/Model/Customer/DataProvider.php
 Magento/InventoryShippingAdminUi/Ui/DataProvider
+Magento/Elasticsearch/Model/Client/Elasticsearch
 Magento/Elasticsearch6/Model/Client/Elasticsearch