Merge branch '4.4' into 5.2

* 4.4:
  CS fixes
  Bump Symfony version to 4.4.27
  Update VERSION for 4.4.26
  Update CONTRIBUTORS for 4.4.26
  Update CHANGELOG for 4.4.26

Author: nicolas-grekas

Tests/Functional/app/CachePools/bundles.php

@@ -10,7 +10,6 @@
  */
 
 use Symfony\Bundle\FrameworkBundle\FrameworkBundle;
-use Symfony\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\TestBundle;
 
 return [
     new FrameworkBundle(),