MC-15256: Exported customer without modification can not be imported

- Fix static test

Author: Nikita Chubukov

app/code/Magento/CustomerImportExport/Model/Import/Customer.php

@@ -521,8 +521,10 @@ protected function _importData()
                     );
                 } elseif ($this->getBehavior($rowData) == \Magento\ImportExport\Model\Import::BEHAVIOR_ADD_UPDATE) {
                     $processedData = $this->_prepareDataForUpdate($rowData);
+                    // phpcs:disable Magento2.Performance.ForeachArrayMerge
                     $entitiesToCreate = array_merge($entitiesToCreate, $processedData[self::ENTITIES_TO_CREATE_KEY]);
                     $entitiesToUpdate = array_merge($entitiesToUpdate, $processedData[self::ENTITIES_TO_UPDATE_KEY]);
+                    // phpcs:enable
                     foreach ($processedData[self::ATTRIBUTES_TO_SAVE_KEY] as $tableName => $customerAttributes) {
                         if (!isset($attributesToSave[$tableName])) {
                             $attributesToSave[$tableName] = [];