public static byte[] makeColumn(byte[] family, byte[] qualifier) {
    return Bytes.add(family, COLUMN_FAMILY_DELIM_ARRAY, qualifier);
  }
Makes a column in family:qualifier form from separate byte arrays.
<p>
Not recommended for usage as this is old-style API.
@return family:qualifier
hbase-common/src/main/java/org/apache/hadoop/hbase/CellUtil.java