@AfterClass
  public static void stopCluster() throws Exception {
    UTIL.shutdownMiniDFSCluster();
    FileUtils.deleteDirectory(new File(TEMP_DIR));
  }
Test that we correctly reload the cache, filter directories, etc. while the temporary directory
is on a different file system than the root directory
hbase-server/src/test/java/org/apache/hadoop/hbase/master/snapshot/TestSnapshotFileCacheWithDifferentWorkingDir.java