AbstractZipArchiver broken on OpenJDK9 since "project Verona" was integrated

[Sanne]

Since the preview build 95 of OpenJDK 9 "project Verona" was integrated in the JDK:

• http://openjdk.java.net/projects/verona/
• http://openjdk.java.net/jeps/223

This changed the string formats used by the JVM to report which version is being run, and the AbstractZipArchiver currently assumes the old version format.

This seems to affect anyone attempting to build a project using Maven on the latest JDK, as several maven plugins rely on plexus-archiver.

Thanks

[Sanne]

See also pr #12

[krosenvold]

Thanks!