[3.5] bpo-30131: test_logging now joins queue threads (#1298) by vstinner · Pull Request #1318 · python/cpython

QueueListenerTest of test_logging now closes the multiprocessing
Queue and joins its thread to prevent leaking dangling threads to
following tests.

Add also @support.reap_threads to detect earlier if a test leaks
threads (and try to "cleanup" these threads).
(cherry picked from commit 8ca2f2f)