[DependencyInjection] fixed missing 'factory-class' attribute in XmlDumper output

Symfony\Component\DependencyInjection\Dumper\XmlDumper didn't write 'factory-class' XML attribute for definitions on which setFactoryClass() was called.

This caused the Container[Builder] to throw an exception when the relevant service is being requested/initiated after loading the dumped XML:

`Uncaught Exception Symfony\Component\DependencyInjection\Exception\RuntimeException: "Cannot create service "xxx" from factory method without a factory service or factory class." at /<path>/<to>/vendor/symfony/dependency-injection/Symfony/Component/DependencyInjection/ContainerBuilder.php`

Fixed the problem, and updated the relevant test fixture.
Merge branch '2.3' into 2.4

* 2.3:
  Fixed relative redirects for ambiguous paths
  [BrowserKit] Fix browser kit redirect with ports
  [TwigBridge] [Form] Fixed some extra empty spaces
  Plural fix
  removed some .gitattributes that should have been removed a lot time ago
  [DependencyInjection] fixed missing 'factory-class' attribute in XmlDumper output
  fixed whitespace in Twig form template
  built-in server: exit when docroot does not exist

Conflicts:
	src/Symfony/Bridge/Twig/Resources/views/Form/form_div_layout.html.twig
Merge branch '2.4' into 2.5

* 2.4:
  Fixed relative redirects for ambiguous paths
  [BrowserKit] Fix browser kit redirect with ports
  [TwigBridge] [Form] Fixed some extra empty spaces
  Plural fix
  removed some .gitattributes that should have been removed a lot time ago
  [DependencyInjection] fixed missing 'factory-class' attribute in XmlDumper output
  fixed whitespace in Twig form template
  built-in server: exit when docroot does not exist

Conflicts:
	src/Symfony/Bundle/FrameworkBundle/Command/ServerRunCommand.php
	src/Symfony/Component/DependencyInjection/Tests/Fixtures/xml/services9.xml
[DIC] Fixed: anonymous services are always private
Merge branch '2.5'

* 2.5: (37 commits)
  [Validator] Backported constraint validator tests from 2.5
  [Validator] Backported constraint validator tests from 2.5
  [DIC] Fixed: anonymous services are always private
  Fix toolbar vertical alignment.
  [HttpFoundation] MongoDbSessionHandler supports auto expiry via configurable expiry_field
  [Validator] Fix little typo in ExecutionContextInterface::buildViolation() method comments
  fix dependencies on HttpFoundation component
  [FrameworkBundle] add missing attribute to XSD
  Allow basic auth in url. Improve regex. Add tests.
  fix typos and syntax in Profiler controller method comments
  resolve parameters before the configs are processed
  add symfony/yaml suggestion to composer.json
  [HttpKernel] added an analyze of environment parameters for built-in server.
  remove volatile tests
  [Console] fixed style creation when providing an unknown tag option
  change command to which available under most unix systems
  add way to test command under windows
  fix shell command injection
  [Form] allowed CallbackTransformer to use callable
  [Process] Added process synchronization to the incremental output tests
  ...

Conflicts:
	src/Symfony/Component/Form/Extension/Validator/Constraints/FormValidator.php
	src/Symfony/Component/HttpKernel/Kernel.php
	src/Symfony/Component/HttpKernel/composer.json
	src/Symfony/Component/Validator/Constraints/AllValidator.php
	src/Symfony/Component/Validator/Constraints/CollectionValidator.php
	src/Symfony/Component/Validator/Constraints/LegacyAllValidator.php
	src/Symfony/Component/Validator/Constraints/LegacyCollectionValidator.php
	src/Symfony/Component/Validator/Tests/Constraints/FileValidatorTest.php