fix docblocks in filesystem
Fix auth docblocks
$value implements RenderableInterface
Remove useless $app argument
Fix doc block.
Remove social interfaces.
Adding to a few contracts.
Guard must implements Authenticator Contract

Fix AuthController not working.
Move UrlGenerator contract to routing where it belongs.
Add a few more quotes.
Make setting URL root controller namespace more configurable.
Merge pull request #5586 from anhskohbo/patch-1

[4.3] Guard must implements Authenticator Contract
Merge pull request #5552 from lucasmichot/4.3-asp

[4.3] Foundation : remove useless $app argument
Merge pull request #5550 from lucasmichot/4.3-view-renderable-interface

[4.3] View : ensure that $value implements RenderableInterface
Fix migration path.
Fixing implements.
Fixing paths.
Fix imports and check.
Fix paths.
Merge pull request #5549 from lucasmichot/4.3-auth-docblocks

[4.3] Auth : fix docblocks