Merge branch '2.8'

* 2.8:
  Fix merge
  [ci] Fix tests requirements
  [ci] SymfonyTestsListener is now auto-registered
  adds validation messages missing italian translations
  [Console] fixed progress bar format on edge cases
  fix bug with set max count, by start method in progress bar
  Rename CollectionType options for entries

Conflicts:
	appveyor.yml
	src/Symfony/Component/ClassLoader/Tests/LegacyApcUniversalClassLoaderTest.php
	src/Symfony/Component/Console/Helper/ProgressBar.php
	src/Symfony/Component/Form/Tests/Extension/Core/Type/CollectionTypeTest.php
	src/Symfony/Component/HttpKernel/Tests/Profiler/MongoDbProfilerStorageTest.php
	src/Symfony/Component/HttpKernel/Tests/Profiler/SqliteProfilerStorageTest.php
	src/Symfony/Component/Validator/Tests/Mapping/Cache/LegacyApcCacheTest.php

Author: nicolas-grekas