Merge branch '2.7' into 2.8

* 2.7:
  [Console] Add missing `@require` annotation in test
  Fix merge
  [appveyor] Fix failure reporting
  [#17634] move DebugBundle license file
  backport GlobTest from 2.7 branch
  Move licenses according to new best practices
  [FrameworkBundle] Remove unused code in test
  [2.3] Fixed an undefined variable in Glob::toRegex
  simplified a test
  fix container cache key generation
  [Form] fix option name in changelog
  [Translation] Add resources from fallback locale
  [DependencyInjection] enforce tags to have a name
  [YAML] Refine the return value of Yaml::parse()

Conflicts:
	src/Symfony/Component/DependencyInjection/Tests/Loader/YamlFileLoaderTest.php

Author: nicolas-grekas