The ignoreAttributes itself should be ignored, too.
Merge branch '2.3'

* 2.3:
  [Form] fixes empty file-inputs get treated as extra field
  return 0 if there is no valid data
  [DependencyInjection] fixed regression where setting a service to null did not trigger a re-creation of the service when getting it
  [DependencyInjection] fixed #8570
  fixed file permission
  The ignoreAttributes itself should be ignored, too.
  [Tests] Tests on php 5.5 should pass
  [Twig] fixed TwigEngine::exists() method when a template contains a syntax error (closes #88546)
[FrameworkBundle] fixed regression where the command might have the wrong container if the application is reused several times
merged branch fabpot/console-fix (PR #8599)

This PR was merged into the master branch.

Discussion
----------

[FrameworkBundle] fixed regression where the command might have the wrong container if the application is reused several times

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | n/a
| License       | MIT
| Doc PR        | n/a

This fixes a regression introduced in #8242. Before this PR, the commands were always getting the current container registered in the kernel. But as the commands are now registered only once, if the container changes, the commands were not aware of this change. That happens quite frequently in functional tests where the Kernel is booted and shutdown several times in the same process.

Commits
-------

1bd45b3 [FrameworkBundle] fixed regression where the command might have the wrong container if the application is reused several times