RFR: New JMH for class redefintion

[eric.caspole at oracle.com]

Hi everybody,

Could I have any reviews or comments on this new JMH to be able to test 
the work for class redefinition in JDK-8139551.

thanks,

Eric

Related JBS:

https://bugs.openjdk.java.net/browse/JDK-8139551

Webrev:

http://cr.openjdk.java.net/~ecaspole/redefine_jmh/webrev/