hg: code-tools/jcstress: Further tune-ups for interrupt.WeakReferenceTest for concurrent GCs

[shade at redhat.com]

Changeset: 6510f53ebe89
Author:    shade
Date:      2018-11-04 21:12 +0100
URL:       http://hg.openjdk.java.net/code-tools/jcstress/rev/6510f53ebe89

Further tune-ups for interrupt.WeakReferenceTest for concurrent GCs

! tests-custom/src/main/java/org/openjdk/jcstress/tests/interrupt/WeakReferenceTest.java