Update src/Symfony/Component/HttpFoundation/Request.php

This makes `getContentType()` work when a regular form is submitted.
[Form] Choice children can be template customized like collection
[Serializer] Added PropertyNormalizer, a new normalizer that maps an object's properties to an array
Call AuthenticationManager in AnonymousAuthenticationListener
[HttpKernel] Extract method to make callable controller in ControllerResolver

correct naming
SSI support
Disallow abstract definitions from doctrine event listener registration
[HttpFoundation] ResponseHeaderBag::clearCookie now accepts secure/httpOnly
Add missing dot at the end of an exception message
[Translation:update][Xliff Dumper] added target-language.
Added verbosity methods
[HttpFoundation] Added a switch to delete file after the response is send
Added line feed to container alias description (text descriptor)
New service to simplify password encoding
Improving the exception message when the bundle name is wrong for the controller in a route

Usually, it is wrong because you've chosen the wrong bundle name in your _controller syntax.
But this also tries to imply that you *might* be missing your bundle initialization in AppKernel
(though I think this is much much less common).
[Console] Add threshold for ProcessHelper verbosity
[FrameworkBundle] Use ProcessHelper for server:run command
removed defaults from PHPUnit configuration
[Form] Check if IntlDateFormatter constructor returned a valid object before using it
updated CHANGELOG for 2.5.1