Run all tests in parallel.
Merge branch '2.2' into 2.3

* 2.2:
  Run all tests in parallel.
  Fixed an entity class name.

Conflicts:
	.travis.yml
	src/Symfony/Bridge/Doctrine/Tests/Form/Type/EntityTypePerformanceTest.php
Merge branch '2.3'

* 2.3:
  Run all tests in parallel.
  Fixed an entity class name.
  [HttpKernel] fix usage of deprecated FlattenException

Conflicts:
	src/Symfony/Component/HttpKernel/EventListener/ExceptionListener.php