report_stages: Use the full GSContextMock.
If a test tries to mock a specific GS function, but doesn't use
GSContextMock, it can block in run_tests while trying (inside a retry
loop) to fetch gsutil.
This can block other tests who also try to fetch gsutil.
TEST=Ran tests in conditions that reproduce the bug.
Tested-by: Don Garrett <firstname.lastname@example.org>
Reviewed-by: David James <email@example.com>
Commit-Queue: Dan Shi <firstname.lastname@example.org>
1 file changed