public static KeyValue createFirstOnRow(final byte[] row, final byte[] family,
    final byte[] qualifier) {
    return new KeyValue(row, family, qualifier, HConstants.LATEST_TIMESTAMP, KeyValue.Type.Maximum);
  }
Create a KeyValue for the specified row, family and qualifier that would be smaller than all
other possible KeyValues that have the same row,family,qualifier. Used for seeking.
@param row       - row key (arbitrary byte array)
@param family    - family name
@param qualifier - column qualifier
@return First possible key on passed <code>row</code>, and column.
hbase-common/src/main/java/org/apache/hadoop/hbase/KeyValueUtil.java