[make:controller] [make:crud] [make:registration-form] [make:reset-password] [make:security:form-login] Fix error while generating PHPUnit tests

[Maxcastel]

Fixes: #1718

Change

if (!class_exists(WebTestCase::class)) {
    $io->caution('You\'ll need to install the `symfony/test-pack` to execute the tests for your new controller.');
}

to

if (!class_exists(TestCase::class)) {
    $io->caution('You\'ll need to install the `symfony/test-pack` to execute the tests for your new controller.');
}

• Symfony\Bundle\FrameworkBundle\Test\WebTestCase to PHPUnit\Framework\TestCase

Error is now displayed and files are created