bug symfony#24498 [Bridge\PhpUnit] Fix infinite loop when running isolated method (nicolas-grekas)

This PR was merged into the 3.3 branch.

Discussion
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[Bridge\PhpUnit] Fix infinite loop when running isolated method

| Q             | A
| ------------- | ---
| Branch?       | 3.3
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

May unlock symfony#23003 (ping @paul-m)
And required to make symfony#23711 pass.

Commits
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e07c2f1 [Bridge\PhpUnit] Fix infinite loop when running isolated method

Author: nicolas-grekas

src/Symfony/Bridge/PhpUnit/bin/simple-phpunit

@@ -81,6 +81,11 @@ if (!file_exists("$PHPUNIT_DIR/phpunit-$PHPUNIT_VERSION/phpunit") || md5_file(__
 
 define('PHPUNIT_COMPOSER_INSTALL', __DIR__.'/vendor/autoload.php');
 require PHPUNIT_COMPOSER_INSTALL;
+if (class_exists('PHPUnit_Util_Blacklist')) {
+    PHPUnit_Util_Blacklist::$blacklistedClassNames['\PHPUnit\Framework\TestCase'] = 3;
+} else {
+    PHPUnit\Util\Blacklist::$blacklistedClassNames['\PHPUnit\Framework\TestCase'] = 3;
+}
 Symfony\Bridge\PhpUnit\TextUI\Command::main();
 
 EOPHP