Merge branch '2.7' into 2.8

* 2.7:
  [TwigBridge] fix tests
  Tag the FormFieldRegistry as being internal
  [Form] Fix Date\TimeType marked as invalid on request with single_text and zero seconds
  [Validator] Added missing swedish translation
  [TranslationDebug] workaround for getFallbackLocales.
  [Translation] fixed nested fallback catalogue  using multiple locales.
  fixed phpdoc
  [Command] Fixed method comments as phpDoc syntax

Command/Command.php

@@ -205,8 +205,6 @@ protected function initialize(InputInterface $input, OutputInterface $output)
      *
      * @return int The command exit code
      *
-     * @throws \Exception
-     *
      * @see setCode()
      * @see execute()
      */