RFR: 8234089: (zipfs) Remove classes JarFileSystemProvider and JarFileSystem

[Langer, Christoph]

Hi Lance,

thanks for reviewing. I've addressed your points:

> I would suggesting moving the code added to the constructor for checking
> the releaseVersion/multi-release properties to a method and grouping it
> with the other methods added for supporting MR jars around line 1396.
> (keeps it easier to follow and maintain)

Done that.

> Could you also add a comment above the isMultiReleaseJar method to for
> clarity going forward (I know there was not one there before)

Done, too.

> I might change the name of the lookup field in the method makeParentDirs
> with the addition of the Function lookup on line 126.

I chose to change the name of the global field in line 126 to be named mrlookup. Also updated the comment.

This is the new webrev: http://cr.openjdk.java.net/~clanger/webrevs/8234089.2/

Cheers
Christoph