RFR [8026756] Test java/util/zip/GZIP/GZIPInZip.java failed again

[Ivan Gerasimov]

Hello everybody!

When I proposed a fix for 8023431 I messed up with verifying the fix 
somehow, and the test started to fail right after pushing the fix.
I'm sorry about that.

The reason of the failure is that when GZIPStream is closed, it also 
closes the underlying stream.

In this fix I removed try-with-resource block around GZIPStreams usage, 
so they do not close the underlying ZipStreams.
I also got rid of the threads and replaced the logic with simple 
ByteArrayStreams manipulations.

Please have a chance to review the webrev:
http://cr.openjdk.java.net/~igerasim/8026756/0/webrev/

Sincerely yours,
Ivan Gerasimov