This is a followup to WT-7639. test_tiered02.py fails with messages:
[2021/06/15 03:57:40.705] directory items: [] is not greater than 0! [2021/06/15 03:57:40.705] waiting to see if it resolves [2021/06/15 03:57:40.705] checking again [2021/06/15 03:57:40.907] checking again ... [2021/06/15 03:57:41.721] checking again [2021/06/15 03:57:41.722] resolved, now see: ['test_tiered02-0000000001.wtobj']
After the flush_tier completes and returns, the test looks for the existence of the file in the bucket and it's not there, but it shows up within a second.