Merge branch '2.7' into 2.8

* 2.7:
  Various fixes esp. on Windows
  Fix the validation of form resources to register the default theme
  Fix the retrieval of the value with property path when using a loader
  [appveyor] minor enhancements
  [Process] Disable failing tests on Windows
  [Translation] Fix the string casting in the XliffFileLoader
  Windows and Intl fixes
  Add appveyor.yml for C.I. on Windows
  [VarDumper] fixed HtmlDumper to target specific the head tag
  [travis] merge php: nightly and deps=high test-matrix lines
  consistently use str_replace to unify directory separators
  Support omitting the <target> node in an .xlf file.
  Fix the handling of values for multiple choice types
  moved PHP nightly to PHP 7.0
  [Security] Add missing docblock in PreAuthenticatedToken

Conflicts:
	.travis.yml

Author: nicolas-grekas

Authentication/Token/AbstractToken.php

@@ -33,7 +33,7 @@ abstract class AbstractToken implements TokenInterface
     /**
      * Constructor.
      *
-     * @param RoleInterface[] $roles An array of roles
+     * @param RoleInterface[]|string[] $roles An array of roles
      *
      * @throws \InvalidArgumentException
      */

Authentication/Token/PreAuthenticatedToken.php

@@ -11,6 +11,8 @@
 
 namespace Symfony\Component\Security\Core\Authentication\Token;
 
+use Symfony\Component\Security\Core\Role\RoleInterface;
+
 /**
  * PreAuthenticatedToken implements a pre-authenticated token.
  *
@@ -23,6 +25,11 @@ class PreAuthenticatedToken extends AbstractToken
 
     /**
      * Constructor.
+     *
+     * @param string|object            $user        The user
+     * @param mixed                    $credentials The user credentials
+     * @param string                   $providerKey The provider key
+     * @param RoleInterface[]|string[] $roles       An array of roles
      */
     public function __construct($user, $credentials, $providerKey, array $roles = array())
     {