RFR: 8189373: jmap -heap exited with error code

[Roman Kennke]

My recent CMSHeap extraction has broken the JVM servicability agent. It 
looks like I actually need a little bit more boilerplate to make it happy:

http://cr.openjdk.java.net/~rkennke/8189373/webrev.00/ 
<http://cr.openjdk.java.net/%7Erkennke/8189373/webrev.00/>

It does fix the test that's mentioned in the bug report:

https://bugs.openjdk.java.net/browse/JDK-8189373

Is this the correct way to fix it?

Roman