private void cleanupFile(FileSystem fileSys, Path name) throws IOException {
    assertTrue(fileSys.exists(name));
    assertTrue(fileSys.delete(name, true));
    assertTrue(!fileSys.exists(name));
  }
Ugly test that ensures we can get at the hedged read counters in dfsclient. Does a bit of
preading with hedged reads enabled using code taken from hdfs TestPread.
hbase-server/src/test/java/org/apache/hadoop/hbase/util/TestFSUtils.java