[Routing] fix merge

Author: xabbuh

Loader/XmlFileLoader.php

@@ -221,6 +221,9 @@ protected function parseImport(RouteCollection $collection, \DOMElement $node, $
             if (null !== $methods) {
                 $subCollection->setMethods($methods);
             }
+            $subCollection->addDefaults($defaults);
+            $subCollection->addRequirements($requirements);
+            $subCollection->addOptions($options);
 
             if ($namePrefix = $node->getAttribute('name-prefix')) {
                 $subCollection->addNamePrefix($namePrefix);

Loader/YamlFileLoader.php

@@ -216,6 +216,9 @@ protected function parseImport(RouteCollection $collection, array $config, $path
             if (null !== $methods) {
                 $subCollection->setMethods($methods);
             }
+            $subCollection->addDefaults($defaults);
+            $subCollection->addRequirements($requirements);
+            $subCollection->addOptions($options);
 
             if (isset($config['name_prefix'])) {
                 $subCollection->addNamePrefix($config['name_prefix']);