RFR [8023431] Test java/util/zip/GZIP/GZIPInZip.java failed

[Ivan Gerasimov]

Hello all!

Would you please help review a fix for the intermittently failing regtest?
http://bugs.sun.com/view_bug.do?bug_id=8023431


The reasons of the failures were non closed PipedInput/OutputStreams.
Thus Read/write dead end were reported.

The fix is to use try-with-resource for appropriate closing the streams.
Here is the webrev:
http://cr.openjdk.java.net/~igerasim/8023431/0/webrev/

In addition to the fix I added a small enhancement to the test itself.
Now it also tests that the ZipStream isn't closed in the case of 
malformed nested GZiped entries.

Sincerely yours,
Ivan Gerasimov