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
Disallow abstract definitions from doctrine event listener registration
[Form][Validator] All index items after children are to be considered grand-children when resolving ViolationPath (fixes #11458)
add allow_html5 option to date and time FormType to disable HTML5 date input when widget is set to single_text

remove unnecessary test when creating datetime format data transformer
[Console] Skip commands from ConsoleCommandEvent

Use case: We have different variations of the same application, for which
only certain commands are allowed. Right now this is done in a custom
Application class, but it would be much easier to just be able to skip
commands from a listener, where you can disable commands via the Event
object.

This patch provides this feature and corresponding test cases.

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes - for Console tests
| Fixed tickets | None
| License       | MIT
| Doc PR        | None
[MonologBridge] Ignore empty context/extra by default in the ConsoleFormatter
Changed order of validation
[WebProfilerBundle] turbolinks compatibility
[Translation] made XliffFileDumper support CDATA sections.
Made optimization deprecating modulus operator
[FrameworkBundle] Add Event Dispatcher debug command
[YAML] resolve variables in inlined YAML
[Validator] deprecate member metadata accessors in favor of existing property metadata accessors

add changelog for deprecations

fix test
add test for #11604

Adds a test case for #11604 to avoid regressions. The actual issue
has been fixed in Symfony 2.3 with the merge of #11615.
[Form] FormBuilder::getIterator() now deals with resolved children
[Validator] add getConstraints to MetadataInterface