private void append(final ExtendedCell cell) throws IOException {
      appendGeneralBloomfilter(cell);
      appendDeleteFamilyBloomFilter(cell);
      writer.append(cell);
      trackTimestamps(cell);
    }
Record the earlest Put timestamp. If the timeRangeTracker is not set, update TimeRangeTracker
to include the timestamp of this key
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFileWriter.java