MC-18935 Customer Segment Discount Not Applying In Customer Non-Primary Store

- Disable database isolation due to database schema change: a newly-created index contains only information about data current at the time the index was created. Therefore, you should not run queries in a transaction that might use a secondary index that did not exist at the beginning of the transaction. There is no way for InnoDB to access “old” data that is consistent with the rest of the data read by the transaction. see https://dev.mysql.com/doc/refman/5.5/en/innodb-create-index-limitations.html

Author: bubasuma

dev/tests/integration/testsuite/Magento/MediaStorage/Helper/File/Storage/DatabaseTest.php

@@ -51,6 +51,7 @@ protected function setUp()
      * test for \Magento\MediaStorage\Model\File\Storage\Database::deleteFolder()
      *
      * @magentoDataFixture Magento/MediaStorage/_files/database_mode.php
+     * @magentoDbIsolation disabled
      */
     public function testDeleteFolder()
     {