RFR(M) 8240990: convert clhsdb "dumpclass" command from javascript to java

[Chris Plummer]

Hello,

Please review the following:
https://bugs.openjdk.java.net/browse/JDK-8240990
http://cr.openjdk.java.net/~cjplummer/8240990/webrev.00

The javascript code was just a few lines like other recent commands, but 
it had quite a bit of support on the java side in 
JSJavaScriptEngine.dumpClass(), which needed some massaging when moved 
to CommandProcessor.java. The CR contains the javascript and java code 
that was converted.

thanks,

Chris