compatibility with phpunit 10

Author: dbu

tests/Functional/Varnish/UserContextFailureTest.php

@@ -31,7 +31,9 @@ class UserContextFailureTest extends VarnishTestCase
     public function setUp(): void
     {
         // needs to be decided before doing the setup
-        $this->mode = 'testHashRequestFailure' === $this->getName() ? 'failure' : 'cache';
+        // phpunit 9 calls the method getName(), phpunit 10 name()
+        $name = method_exists($this, 'name') ? $this->name() : $this->getName(); /* @phpstan-ignore-line */
+        $this->mode = 'testHashRequestFailure' === $name ? 'failure' : 'cache';
 
         parent::setUp();
     }