Update template reference

This makes it compatible with modern SF framework settings

Author: MKodde

src/Metadata/MetadataFactory.php

@@ -88,7 +88,7 @@ public function generate()
 
         $metadata->document = DOMDocumentFactory::create();
         $metadata->document->loadXML($this->templateEngine->render(
-            'SurfnetSamlBundle:Metadata:metadata.xml.twig',
+            '@SurfnetSaml/Metadata/metadata.xml.twig',
             ['metadata' => $metadata]
         ));
 

src/Tests/Component/Metadata/MetadataFactoryTest.php

@@ -48,7 +48,7 @@ public function setUp()
         // Load the XML template from filesystem as the FilesystemLoader does not honour the bundle prefix
         $loader = new ArrayLoader(
             [
-                'SurfnetSamlBundle:Metadata:metadata.xml.twig' => file_get_contents('src/Resources/views/Metadata/metadata.xml.twig')
+                '@SurfnetSaml/Metadata/metadata.xml.twig' => file_get_contents('src/Resources/views/Metadata/metadata.xml.twig')
             ]
         );
         $this->twig = new Environment($loader);