RFR(XS): 8044591: [TESTBUG] com/sun/management/GarbageCollectorMXBean/GarbageCollectionNotificationp[Content]Test.java fail when -XX:+ExplicitGCInvokesConcurrent

[Yekaterina Kantserova]

Hi,

Could I please have a review of this small fix.

bug: https://bugs.openjdk.java.net/browse/JDK-8044591
webrev: http://cr.openjdk.java.net/~ykantser/8044591/webrev.00/

Thanks,
Katja