hg: jdk/sandbox: Add gtests for arena policy growth

[thomas.stuefe at gmail.com]

Changeset: 87167f31740f
Author:    stuefe
Date:      2020-07-17 12:40 +0200
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/87167f31740f

Add gtests for arena policy growth

! src/hotspot/share/memory/metaspace/internStat.hpp
! src/hotspot/share/memory/metaspace/spaceManager.cpp
! test/hotspot/gtest/metaspace/metaspaceTestsCommon.hpp
! test/hotspot/gtest/metaspace/test_arenagrowthpolicy.cpp
! test/hotspot/gtest/metaspace/test_spacemanager.cpp