[3.9] [3.10] gh-91607: Fix several test_concurrent_futures tests to actually test what they claim (GH-91600) (GH-91612)#91617

Merged

gpshead merged 2 commits intopython:3.9from

gpshead:backport-9a45893-3.9

Apr 17, 2022

Commits on Apr 16, 2022

[3.9] [3.10] gh-91607: Fix several test_concurrent_futures tests to actually test what they claim (GH-91600) (GH-91612)
gpshead
committed
undo a mis-merge on an import statement.
gpshead
authored