Merge branch '3.3' into 3.4

* 3.3:
  [Serializer] Fix extra attributes when no group specified
  [Intl] Make intl-data tests pass and save language aliases again
  [Console] Fix CommandTester::setInputs() docblock
  [Serializer] readd default argument value
  [VarDumper] fix trailling comma when dumping an exception
  Remove useless docblocks
  [FrameworkBundle] Fix docblocks
  [PropertyInfo] Remove useless docblocks

Author: nicolas-grekas

ExpressionLanguage.php

@@ -23,9 +23,6 @@
  */
 class ExpressionLanguage
 {
-    /**
-     * @var CacheItemPoolInterface
-     */
     private $cache;
     private $lexer;
     private $parser;