[FrameworkBundle] Skip test if xdebug.file_link_format is defined.

The test suite does not pass locally because I use a custom
file_link_format. I do it because it works everywhere.

Then, Symfony tries to read this value before the default one.
We could use ini_set before the test but unfortunatelly there are no way
to define the "cfg_var". For recall, get_cfg_var allows to return the
configuration value even if the extension is not loaded. And again it's
my case: I don't enable xdebug to have better performance.

Author: lyrixx

src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/FrameworkExtensionTest.php

@@ -318,6 +318,10 @@ public function testAnnotations()
 
     public function testFileLinkFormat()
     {
+        if (ini_get('xdebug.file_link_format') || get_cfg_var('xdebug.file_link_format')) {
+            $this->markTestSkipped('A custom file_link_format is defined.');
+        }
+
         $container = $this->createContainerFromFile('full');
 
         $this->assertEquals('file%link%format', $container->getParameter('templating.helper.code.file_link_format'));