@Override
  public void close() {
    heapMemStats.close();
    nonHeapMemStats.close();
    vmStats.close();
    closeStatsMap(mpMap);
    closeStatsMap(gcMap);
  }
Handle JDK-8207200 gracefully while fetching getNonHeapMemoryUsage from MemoryMXBean.

@see <a href="https://bugs.openjdk.java.net/browse/JDK-8207200">JDK-8207200</a>
geode-core/src/main/java/org/apache/geode/internal/stats50/VMStats50.java