magento-engcom/import-export-improvements#88: Set store id for product category initialization to 0. Would otherwise be null and set to 1 in \Magento\Catalog\Model\ResourceModel\Collection\AbstractCollection::getStoreId, leading to unwanted store values for category names.

Author: carstenpfeifer

Diff for: app/code/Magento/CatalogImportExport/Model/Import/Product/CategoryProcessor.php

@@ -75,6 +75,7 @@ protected function initCategories()
             $collection->addAttributeToSelect('name')
                 ->addAttributeToSelect('url_key')
                 ->addAttributeToSelect('url_path');
+            $collection->setStoreId(\Magento\Store\Model\Store::DEFAULT_STORE_ID);
             /* @var $collection \Magento\Catalog\Model\ResourceModel\Category\Collection */
             foreach ($collection as $category) {
                 $structure = explode(self::DELIMITER_CATEGORY, $category->getPath());