[SecurityBundle] adds unit tests suite for SecurityDataCollector class.
Merge branch '2.3' into 2.5

* 2.3:
  [FrameworkBundle] Fixed Translation loader and update translation command.
  [Console] remove « use » statement for PHP built-in exception classes.
  [SecurityBundle] adds unit tests suite for SecurityDataCollector class.

Conflicts:
	src/Symfony/Component/Console/Helper/TableHelper.php