BookKeeperDiskSpaceWeightedLedgerPlacementTest is flaky

[sijie]

BUG REPORT

1. Please describe the issue you observed:

• What did you do?

run ci job

• What did you expect to see?

all tests should pass

• What did you see instead?

org.apache.bookkeeper.client.BookKeeperDiskSpaceWeightedLedgerPlacementTest is failing

https://builds.apache.org/job/bookkeeper-precommit-pullrequest/336/

[ivankelly]

The results no longer exist, so closing. If we find this to be flakey in future, we can reopen.