Flaky-test: org.apache.bookkeeper.test.OpStatTest.testTopLevelBookieWriteCounters

[dlg99]

Got this on CI:

Error:  org.apache.bookkeeper.test.OpStatTest.testTopLevelBookieWriteCounters
Error:    Run 1: OpStatTest.testTopLevelBookieWriteCounters:98->validateOpStat:75->validateOpStat:70->lambda$testTopLevelBookieWriteCounters$0:105
Error:    Run 2: OpStatTest.testTopLevelBookieWriteCounters:98->validateOpStat:75->validateOpStat:70->lambda$testTopLevelBookieWriteCounters$0:105
Error:    Run 3: OpStatTest.testTopLevelBookieWriteCounters:98->validateOpStat:75->validateOpStat:70->lambda$testTopLevelBookieWriteCounters$0:105

passed on rerun