RFR(XXS): 8044540: serviceability/sa/jmap-hashcode/Test8028623.java should be quarantined

[Mikael Auno]

Hi,

Could I please have a review of this very small fix.

webrev: http://cr.openjdk.java.net/~miauno/8044540/webrev.00/
bug: https://bugs.openjdk.java.net/browse/JDK-8044540

Verified locally.

Thanks,
Mikael