hg: jdk/sandbox: Add test for spacemanager growth; fix bugs found by it

[thomas.stuefe at gmail.com]

Changeset: 2e1ace93f395
Author:    stuefe
Date:      2020-07-17 08:34 +0200
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/2e1ace93f395

Add test for spacemanager growth; fix bugs found by it

! src/hotspot/share/memory/metaspace/arenaGrowthPolicy.cpp
! src/hotspot/share/memory/metaspace/chunkLevel.hpp
! src/hotspot/share/memory/metaspace/chunkManager.cpp
! src/hotspot/share/memory/metaspace/classLoaderMetaspace.cpp
! src/hotspot/share/memory/metaspace/spaceManager.cpp
! src/hotspot/share/memory/metaspace/spaceManager.hpp
! test/hotspot/gtest/metaspace/metaspaceTestsCommon.hpp
! test/hotspot/gtest/metaspace/test_spacemanager.cpp