Merge branch '2.3' into 2.7

* 2.3:
  [DependencyInjection] improved a comment for reading fluency
  [HttpKernel] change a class in tests to avoid depending on SQLite
  [ci] Display fastest results first when running tests in parallel
  [Yaml] Improve newline handling in folded scalar blocks

Author: fabpot

Tests/Iterator/RecursiveDirectoryIteratorTest.php

@@ -21,7 +21,7 @@ class RecursiveDirectoryIteratorTest extends IteratorTestCase
     public function testRewindOnFtp()
     {
         try {
-            $i = new RecursiveDirectoryIterator('ftp://ftp.mozilla.org/', \RecursiveDirectoryIterator::SKIP_DOTS);
+            $i = new RecursiveDirectoryIterator('ftp://speedtest.tele2.net/', \RecursiveDirectoryIterator::SKIP_DOTS);
         } catch (\UnexpectedValueException $e) {
             $this->markTestSkipped('Unsupported stream "ftp".');
         }
@@ -37,14 +37,14 @@ public function testRewindOnFtp()
     public function testSeekOnFtp()
     {
         try {
-            $i = new RecursiveDirectoryIterator('ftp://ftp.mozilla.org/', \RecursiveDirectoryIterator::SKIP_DOTS);
+            $i = new RecursiveDirectoryIterator('ftp://speedtest.tele2.net/', \RecursiveDirectoryIterator::SKIP_DOTS);
         } catch (\UnexpectedValueException $e) {
             $this->markTestSkipped('Unsupported stream "ftp".');
         }
 
         $contains = array(
-            'ftp://ftp.mozilla.org'.DIRECTORY_SEPARATOR.'README',
-            'ftp://ftp.mozilla.org'.DIRECTORY_SEPARATOR.'pub',
+            'ftp://speedtest.tele2.net'.DIRECTORY_SEPARATOR.'1000GB.zip',
+            'ftp://speedtest.tele2.net'.DIRECTORY_SEPARATOR.'100GB.zip',
         );
         $actual = array();