RFR: 8081589: Output of -XX:+TraceClassLoadingPreorder in JDK9 incompatible with MakeClasslist tool

[Claes Redestad]

Hi,

please review this rewrite/cleanup of the MakeClasslist tool to operate 
on the output of
-XX:DumpLoadedClassList rather than -XX:+TraceClassLoadingPreorder. 
Since the tool
became rather trivial I opted to write it in nashorn-compliant 
javascript to streamline
the usage.

Bug: https://bugs.openjdk.java.net/browse/JDK-8081589
Webrev: http://cr.openjdk.java.net/~redestad/8081589/webrev.02

A number of undocumented/unused tests were removed and an outdated 
README was
incorporated into the tool source itself, among other things clarifying 
that the checksum
needs to be calculated and added to the classlist before checking it 
into the workspace.

I've asked around about how to go about adding tests for standalone 
tools like these, but
didn't come up with a good answer. If someone insists I add a small test 
to this I'd hope
there's some insight into how best to do that (shell-based jtreg test?)

Thanks!

/Claes