Merge branch '4.0' into 4.1

* 4.0:
  [HttpKernel] fix PHP 5.4 compat
  Fix surrogate not using original request
  [Finder] Update RealIteratorTestCase
  [Routing] remove unneeded dev dep on doctrine/common
  [minor] SCA
  [Validator] Remove BOM in some xlf files
  Fix #27378: Error when rendering a DateIntervalType form with exactly 0 weeks
  [HttpKernel] fix session tracking in surrogate master requests

Author: nicolas-grekas

Tests/Iterator/RealIteratorTestCase.php

@@ -60,11 +60,20 @@ public static function setUpBeforeClass()
 
     public static function tearDownAfterClass()
     {
-        foreach (array_reverse(self::$files) as $file) {
-            if (DIRECTORY_SEPARATOR === $file[strlen($file) - 1]) {
-                @rmdir($file);
+        $paths = new \RecursiveIteratorIterator(
+             new \RecursiveDirectoryIterator(self::$tmpDir, \RecursiveDirectoryIterator::SKIP_DOTS),
+             \RecursiveIteratorIterator::CHILD_FIRST
+         );
+
+        foreach ($paths as $path) {
+            if ($path->isDir()) {
+                if ($path->isLink()) {
+                    @unlink($path);
+                } else {
+                    @rmdir($path);
+                }
             } else {
-                @unlink($file);
+                @unlink($path);
             }
         }
     }