[LANG] Add DateUtils.ceiling methods

It would be nice to have a DateUtils.ceiling methods which would be the
opposite of truncate (which is equivalent to floor)

DateUtils.ceiling(Date d, int field);

For example, if you had the datetime of 28 Mar 2002 13:45:01.231, if you
passed with HOUR, it would return 28 Mar 2002 13:59:59.999. If this was
passed with MONTH, it would return 31 Mar 2002 23:59:59.999.

I find myself needing doing this manually a lot.

Travis