Merge branch '2.3' into 2.6

* 2.3:
  Update DateTimeToArrayTransformer.php
  Mock microtime() and time() in transient tests
  Azerbaijani language pluralization rule
  Move HHVM tests out of the allowed failures

Author: nicolas-grekas

PluralizationRules.php

@@ -55,6 +55,7 @@ public static function get($number, $locale)
          * Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
          */
         switch ($locale) {
+            case 'az':
             case 'bo':
             case 'dz':
             case 'id':
@@ -73,7 +74,6 @@ public static function get($number, $locale)
                 break;
 
             case 'af':
-            case 'az':
             case 'bn':
             case 'bg':
             case 'ca':