hg: jdk/sandbox: Merge

[daniel.fuchs at oracle.com]

Changeset: a594484f54db
Author:    dfuchs
Date:      2018-05-04 17:28 +0100
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/a594484f54db

Merge

! src/hotspot/share/gc/shared/jvmFlagConstraintsGC.cpp
! src/hotspot/share/gc/shared/jvmFlagConstraintsGC.hpp
! src/hotspot/share/runtime/flags/jvmFlagWriteableList.cpp
- src/hotspot/share/services/metaspaceDCmd.cpp
! test/jdk/ProblemList.txt