RFR : JDK-8154166 - java/lang/management/MemoryMXBean/ResetPeakMemoryUsage.java fails with RuntimeException

[Harsha Wardhana B]

Hi,

Please review the below simple fix for issue,
issue : https://bugs.openjdk.java.net/browse/JDK-8154166
webrev : http://cr.openjdk.java.net/~hb/8154166/webrev.00/ 
<http://cr.openjdk.java.net/%7Ehb/8154166/webrev.00/>

-Harsha