* 2.3:
[HttpKernel] add use statement for phpdoc
Disabled the PHPUnit self-update on Travis
[ClassLoader] simplified phpdoc
[ClassLoader] Add a __call() method to XcacheClassLoader
fix some minor typos in tests
[Yaml] fixed mapping keys containing a quoted #
Added fixture to test parsing of hash keys ending with a space and #
[Filesystem Component] mkdir race condition fix#11626
[Validator] reverted permissions change on translation files
Fixed Factory services not within the ServiceReferenceGraph.
[CssSelector] Fix URL to SimonSapin/cssselect repo
[Validator] Fixed wrong translation keys/messages for Collection constraint. The error messages for a missing field and an unexpected field did not match the Contraint class
[YAML] resolve variables in inlined YAML
Disallow abstract definitions from doctrine event listener registration
Conflicts:
src/Symfony/Bridge/Doctrine/DependencyInjection/CompilerPass/RegisterEventListenersAndSubscribersPass.php
src/Symfony/Bridge/Doctrine/Tests/DependencyInjection/CompilerPass/RegisterEventListenersAndSubscribersPassTest.php
src/Symfony/Bundle/FrameworkBundle/EventListener/SessionListener.php
src/Symfony/Component/Filesystem/Filesystem.php
This was implemented in order to satisfy Drupal's requirements for a
singular and a plural message whenever a message is passed to their
implementation of transChoice().
