[8u-dev] Request for approval to backport: 8068338: Better message about incompatible zlib in Deflater.init

[Ivan Gerasimov]

Hi!

Would you please approve backporting of this cleanup fix?
Unshuffled patch applies cleanly.

Bug: https://bugs.openjdk.java.net/browse/JDK-8068338
Jdk9 changeset: http://hg.openjdk.java.net/jdk9/dev/jdk/rev/be91019db7bd
Review: 
http://mail.openjdk.java.net/pipermail/core-libs-dev/2014-December/030493.html

Sincerely yours,
Ivan