tests: ensure LocalServerObjectCache is reset before redefining

If an extension uses this service somewhere, redefining before
resetting it breaks the tests.

Follows-up: Ia60cb0bc18b235f23d9778da8241f65accfc0d35
Change-Id: Ie930f2bbab3d31831751caa1ca342fd9a023b19b

tests/phpunit/MediaWikiIntegrationTestCase.php

@@ -1229,6 +1229,7 @@ abstract class MediaWikiIntegrationTestCase extends PHPUnit\Framework\TestCase {
 				[ 'main' => $bootstrapConfig ]
 			)
 		);
+		$newServices->resetServiceForTesting( 'LocalServerObjectCache' );
 		$newServices->redefineService(
 			'LocalServerObjectCache',
 			static function ( MediaWikiServices $services ) {