Try to fix/improve reporting of test_request_garbage
Try to fix/improve reporting of test_request_garbage

* Run it in a subprocess to reduce possible intereference from the outer pytest
* Print the leaked objects to see if they provide any hints

Akasurde/pytest,nicoddemus/pytest,RonnyPfannschmidt/pytest,hackebrot/pytest,markshao/pytest,The-Compiler/pytest,The-Compiler/pytest,nicoddemus/pytest,alfredodeza/pytest,tomviner/pytest,tomviner/pytest,pytest-dev/pytest