Merge branch '2.3' into 2.7

* 2.3:
  [Process] Remove a misleading comment
  Improve the phpdoc of SplFileInfo methods
  [Process] Use stream based storage to avoid memory issues
  Fixed the documentation of VoterInterface::supportsAttribute
  Remove useless duplicated tests
  [FrameworkBundle] Optimize framework extension tests
  Use is_subclass_of instead of Reflection when possible

Author: fabpot

SplFileInfo.php

@@ -38,6 +38,8 @@ public function __construct($file, $relativePath, $relativePathname)
     /**
      * Returns the relative path.
      *
+     * This path does not contain the file name.
+     *
      * @return string the relative path
      */
     public function getRelativePath()
@@ -48,6 +50,8 @@ public function getRelativePath()
     /**
      * Returns the relative path name.
      *
+     * This path contains the file name.
+     *
      * @return string the relative path name
      */
     public function getRelativePathname()