minor #15993 [ci] Display fastest results first when running tests in parallel (nicolas-grekas)

This PR was merged into the 2.3 branch.

Discussion
----------

[ci] Display fastest results first when running tests in parallel

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

Keeping order prevents seeing failures early as they happen. I propose to display tests results asap instead.
Best viewed with: https://github.com/symfony/symfony/pull/15993/files?w=1

Commits
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3d6c864 [ci] Display fastest results first when running tests in parallel

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();