Tests: `name` option is now required

Since SkinVector provides name via skin.json the name must be
passed in the test constructor.

This will be required as part of
I5772eb760e4fc56d2062a333ba4d7ca6995f3db2

Change-Id: I4087deb8b0726c9959ac15d77a0ed2442e4890f6

tests/phpunit/integration/SkinVectorTest.php

@@ -21,7 +21,7 @@ class SkinVectorTest extends MediaWikiIntegrationTestCase {
 	 * @return \VectorTemplate
 	 */
 	private function provideVectorTemplateObject() {
-		$template = new SkinVector();
+		$template = new SkinVector( [ 'name' => 'vector' ] );
 		return $template;
 	}