RFR: 8214484: ZGC: Exclude SA tests ClhsdbJhisto and TestHeapDumpFor*

[Thomas Schatzl]

Hi,

On Thu, 2018-11-29 at 16:07 +0100, Per Liden wrote:
> There's no support for SA heap walking when using ZGC. Hence the
> tests 
> for this should not execute when ZGC is enabled.
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8214484
> Webrev: http://cr.openjdk.java.net/~pliden/8214484/webrev.0
> 

  looks good after the explanation of the subtleties of jtreg
attributes.

Thanks,
  Thomas