Merge branch '2.8' into 3.2

* 2.8:
  Updated PHPUnit namespaces

Author: nicolas-grekas

Tests/Resource/FileExistenceResourceTest.php

@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Config\Tests\Resource;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\Resource\FileExistenceResource;
 
-class FileExistenceResourceTest extends \PHPUnit_Framework_TestCase
+class FileExistenceResourceTest extends TestCase
 {
     protected $resource;
     protected $file;

Tests/ResourceCheckerConfigCacheTest.php

@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Config\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\Tests\Resource\ResourceStub;
 use Symfony\Component\Config\Resource\FileResource;
 use Symfony\Component\Config\ResourceCheckerConfigCache;
 
-class ResourceCheckerConfigCacheTest extends \PHPUnit_Framework_TestCase
+class ResourceCheckerConfigCacheTest extends TestCase
 {
     private $cacheFile = null;