[TEST] add missing import

Author: polyfractal

tests/Elasticsearch/Tests/YamlRunnerTest.php

@@ -13,6 +13,7 @@
 use Elasticsearch\Common\Exceptions\RequestTimeout408Exception;
 use Elasticsearch\Common\Exceptions\ServerErrorResponseException;
 use Elasticsearch\Common\Exceptions\RoutingMissingException;
+use Elasticsearch\Common\Exceptions\Unauthorized401Exception;
 use GuzzleHttp\Ring\Future\FutureArrayInterface;
 use RecursiveDirectoryIterator;
 use RecursiveIteratorIterator;