[11u] RFR(XS): 8234011: (zipfs) Memory leak in ZipFileSystem.releaseDeflater()

[Volker Simonis]

: Hi,

can I please have a review for the following tiny downport?
The fix itself itself is trivial and applies cleanly. For the test I
had to change two lines because of a missing method in jdk11 compared
to 14.

Original bug and fix:
https://bugs.openjdk.java.net/browse/JDK-8234011
https://hg.openjdk.java.net/jdk/jdk/rev/fe87a92570db

Complete 11u downport:
http://cr.openjdk.java.net/~simonis/webrevs/2020/8234011_11u/
Changes required for 11u downport:
http://cr.openjdk.java.net/~simonis/webrevs/2020/8234011_11u_changes/

In jdk 11 we don't have the `FileSystems.newFileSystem(..)` variant
which takes a `Path` as a first argument so we have to manually
construct a corresponding URI first.

Also notice the small change from `Map.of("create", true)` to
`Map.of("create", "true")` which isn't strictly necessary for OpenJDK
11u but required for Oracle jdk 11 because they haven't downported
JDK-8034802 yet (and we want to be nice to our Oracle colleagues just
in case they want to take this downport as well :)

Thank you and best regards,
Volker

[1] https://bugs.openjdk.java.net/browse/JDK-8034802