Issue #3040605: Order of optional thunder modules install is wrong

[chrfritsch]

Make sure these boxes are checked before submitting your pull request - thank you!

• All coding styles are fulfilled. (How to check for cs issues?)
• All tests are running locally. (How to run the test?)
• Necessary update hooks are provided.
• User roles have correct access for new introduced permission.
• Every thunder module has a README.md in its root. Follow this guidelines, but we don't need every topic.
• Code is covered with well-balanced amount of inline comments.

If you are really awesome, then your feature is covered by additional tests. Well done!

[chrfritsch]

I tried to remove the thunder_install module again in order to use
require_once $install_state['profiles']['thunder']->getPath() . '/src/Installer/Form/ModuleConfigureForm.php';

It loads the form, but the form has still service dependencies that could not be loaded. So I am wondering if loading files manually is really the best solution here.
Do you have another idea, @alexpott ?

[chrfritsch]

Closing in favor of #672