Symfony version(s) affected: 2.8 - 4.2

Description
FrameworkBundle has a direct dependency on the BrowserKit component in framework-bundle/Client.php. BrowserKit is only listed as a dev-dependency. If BrowserKit happens not to be installed, autoloading fails in vendor/symfony/framework-bundle/Client.php:28.

How to reproduce

• Have an (indirect) dependency on FrameworkBundle
• Do not have BrowserKit installed
• Load Client.php in FrameworkBundle

Possible Solution

• Move BrowserKit from the require-dev to the require section