If a previous test in the same process or previously leaked a shared
memory or semaphore handle, tests could fail and cascade down. They
could also interfere with one another. So prevent this issue by
assigning a monotonically-increasing identifier per test function or row
tested and improving how we clean up those we did create.
This shows we need the API to explicitly clean up.
Change-Id: I12a088d1ae424825abd3fffd171db61d6b68a411
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
4141c5e221