Follow up of 2560643 Add test coverage

It's not putenv.

Finally managed to reproduce this in a drupalci container. processChildResult throws a PHPUnit_Framework_Exception because stderr is segmentation fault. Normally, processes dying of segmentation fault do not produce such things and the shell does. Something about shell settings / ulimit / whatnot.

This is a drupalci bug because drupalci PHP is a shell script and not a binary PHP. https://www.drupal.org/node/2567241#comment-10320861

As I mentioned in #2560643-21: Fatal PHPUnit tests are not always reported as failure we can explicitly terminate the process. I was wary of this because I am unsure how well this works on Windows but the solution is self solving: if and when we get a testbot on Windows and this test produces a failure we will have the environment we will be able to investigate. Until then noone runs the whole test suite on Windows. Theoretically this works, anyways.

Doh, I forgot to put back one of the test leakage stopping annotations.

Including files is not the best from a test. Removed the file.inc include.

/shrugs

GRrrrgrrrgrrr!

Looks good.

RTBC + 1 - Looks great!

This works for me. Committed d24a890 and pushed to 8.0.x. Thanks!