Review Request: 8029921: CDS should allow user specify their own classlist

[Jiangli Zhou]

Hi,

Please review following change that allows alternative CDS classlist for 
archiving by specifying -XX:ClassList=<path> from the command-line:

webrev: http://cr.openjdk.java.net/~jiangli/8029921/webrev.00/
bug: https://bugs.openjdk.java.net/browse/JDK-8029921

Thanks,
Jiangli