git: openjdk/jdk: 8257876: Avoid Reference.isEnqueued in tests

[Kim Barrett]

Changeset: db5da961
Author:    Kim Barrett <kbarrett at openjdk.org>
Date:      2020-12-10 10:34:47 +0000
URL:       https://git.openjdk.java.net/jdk/commit/db5da961

8257876: Avoid Reference.isEnqueued in tests

Reviewed-by: mchung, tschatzl

! test/hotspot/jtreg/vmTestbase/gc/gctests/ReferencesGC/ReferencesGC.java
! test/hotspot/jtreg/vmTestbase/gc/gctests/WeakReferenceGC/WeakReferenceGC.java
! test/jdk/java/lang/ref/ReferenceEnqueue.java