private void validateCleanupOfDiskFiles() {
    await().untilAsserted(() -> assertThat(server2Disk2.listFiles()).hasSize(0));
  }
1. Create persistent region server1 with scope global.
<p>
2. Try to create persistent region with same name on server2 with scope d-ack.
<p>
3. Region creation should fail. Check for all files created in the directory for server 2 gets
deleted.
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/CleanupFailedInitWithDiskFilesRegressionTest.java