RFR - 8132734: java.util.jar.* changes to support multi-release jar files

[Steve Drach]

> So why do you want to put this field into the super class JarEntry, not the JarFileEntry, don't see any
> benefit of doing that.

I changed it.  I put the versionedEntry in JarFileEntry instead of JarEntry.  Not too difficult although I had to add a package private method to support JarVerifier.  It seems to work as all 27 jar tests pass (some are not specific to multi-release jars).