RFR 8223418 [lworld] refactor TestNewAcmp.java

[Ioi Lam]

https://bugs.openjdk.java.net/browse/JDK-8223418
http://cr.openjdk.java.net/~iklam/valhalla/8223418-refactor-TestNewAcmp.java.v01/

This is in preparation of implementing the new acmp for C1:

Instead of hard-coding the VM parameters for the 12 scenarios, we should 
specify them programmatically. This makes the test more maintainable and 
allows the user to execute a subset of the scenarios.

Thanks
- Ioi