Fix static tests

Author: ihor-sviziev

dev/tests/static/testsuite/Magento/Test/Legacy/_files/obsolete_classes.php

@@ -4255,6 +4255,6 @@
     ['Magento\Elasticsearch\Elasticsearch5\Model\Adapter\DataMapper\ProductDataMapper'],
     ['Magento\Elasticsearch\Model\Adapter\DataMapper\DataMapperResolver'],
     ['Magento\Elasticsearch\Model\Adapter\Container\Attribute'],
-    ['PHPUnit_Framework_MockObject_MockObject' => 'PHPUnit\Framework\MockObject\MockObject'],
+    ['PHPUnit_Framework_MockObject_MockObject', 'PHPUnit\Framework\MockObject\MockObject'],
     ['PHPUnit\Framework\BaseTestListener'],
 ];