MAGETWO-50594: testAclConfigFile uses full path name in test

Author: slavvka

dev/tests/static/testsuite/Magento/Test/Integrity/Magento/Backend/ControllerAclTest.php

@@ -148,10 +148,10 @@ private function getAclResources()
         if ($this->aclResources !== null) {
             return $this->aclResources;
         }
-        $aclFiles = array_keys(Files::init()->getConfigFiles('acl.xml', []));
+        $aclFiles = Files::init()->getConfigFiles('acl.xml', []);
         $xmlResources = [];
         array_map(function ($file) use (&$xmlResources) {
-            $config = simplexml_load_file($file);
+            $config = simplexml_load_file($file[0]);
             $nodes = $config->xpath('.//resource/@id') ?: [];
             foreach ($nodes as $node) {
                 $xmlResources[(string)$node] = $node;