[windows] Make the test pass on windows that uses another file sep. character
[windows] More feeble attempts trying to figure out why windows fails these tests

Signed-off-by: Peter Kriens <peter.kriens@aqute.biz>
[windows] Extend timeout
[ziptime] Modified > now
It turned out that in certain cases you could report a modified time later than now, so the return is now capped at the current time.
Merge pull request #569 from pkriens/master

Emergency fix, jars could have modified times > now, plus some others for the windows testing