public static StatisticsType getMemoryUsageType() {
    return memoryUsageType;
  }
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