add back test but take UTC offset into account

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/compress/trunk@1647993 13f79535-47bb-0310-9956-ffa450edef68
so my assumption about time zones was wrong

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/compress/trunk@1647999 13f79535-47bb-0310-9956-ffa450edef68
amended for time zone in the wrong direction

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/compress/trunk@1648000 13f79535-47bb-0310-9956-ffa450edef68