hg: jdk9/dev/jdk: 8146012: CleanerTest fails: Cleanable should have been freed

[roger.riggs at oracle.com]

Changeset: 9359b41628d5
Author:    rriggs
Date:      2015-12-22 14:12 -0500
URL:       http://hg.openjdk.java.net/jdk9/dev/jdk/rev/9359b41628d5

8146012: CleanerTest fails: Cleanable should have been freed
Summary: Simplify cleanables being called and use WhiteBox to trigger GC
Reviewed-by: chegar

! test/java/lang/ref/CleanerTest.java