bpo-45310: Fix parrallel shared memory tests (GH-28661)

Add a PID to names of POSIX shared memory objects to allow
running multiprocessing tests (test_multiprocessing_fork,
test_multiprocessing_spawn, etc) in parallel.
(cherry picked from commit eb4495e8e275c83d691add116c4f2b74e73e3cc8)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>

Miss Islington (bot) committed 4y ago

4e6681d0cf9e7ce5621c34ff87055fa1f9786108

Parent: ef7c729

Committed by GitHub <noreply@github.com> on 10/1/2021, 9:41:20 AM