[8u] RFR backport JDK-7143743 : (zipfs) Potential memory leak with zip provider

[Jaikiran Pai]

Would there be interest in backporting the fix for JDK-7143743[1] to
Java 8? If so, can I please get a review and a sponsor for the patch
which backports it?

The original fix that was committed to "jdk" repo resides here[2]. Due
to the changes in file paths of the source files, this patch doesn't
apply cleanly but is fairly trivial.

The webrev containing this backport resides at [3]. I've followed some
conventions suggested by Andrew in his recent mail for a similar
backport request and have started with a clean list of "Reviewers" in
the commit message.


[1] https://bugs.openjdk.java.net/browse/JDK-7143743

[2] https://hg.openjdk.java.net/jdk/jdk/rev/06331540be15

[3] https://cr.openjdk.java.net/~jpai/webrev/7143743-8u/1/webrev/

-Jaikiran