RFR: 8241881: ZGC: Add tests for JFR events

[Stefan Karlsson]

Looks good.

StefanK

On 2020-03-30 22:38, Per Liden wrote:
> Add tests for the newly added ZGC-specific JFR events that we intend to 
> make non-experimental as part of JEP 377. These events are:
> 
> ZAllocationStall
> ZPageAllocation
> ZPageCacheFlush
> ZRelocationSet
> ZRelocationSetGroup
> ZUncommit
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8241881
> Webrev: http://cr.openjdk.java.net/~pliden/8241881/webrev.0
> 
> /Per