hg: jdk/jdk: 8248266: ZGC: TestUncommit.java fails due to "Exception: Uncommitted too fast" again

[per.liden at oracle.com]

Changeset: 37b52f3884b0
Author:    pliden
Date:      2020-08-18 16:37 +0200
URL:       https://hg.openjdk.java.net/jdk/jdk/rev/37b52f3884b0

8248266: ZGC: TestUncommit.java fails due to "Exception: Uncommitted too fast" again
Reviewed-by: shade, eosterlund

! src/hotspot/share/gc/z/zPage.inline.hpp
! src/hotspot/share/gc/z/zPageCache.cpp
+ test/hotspot/jtreg/gc/z/TestNoUncommit.java
! test/hotspot/jtreg/gc/z/TestUncommit.java