RFR (XS) 8024425: VM_HeapDumper doesn't put anonymous classes in the heap dump

[Fredrik Arvidsson]

Hi

Please help me to review the changes below:

Jira case: https://bugs.openjdk.java.net/browse/JDK-8024425 
<https://bugs.openjdk.java.net/browse/JDK-8024423>
Webrev: http://cr.openjdk.java.net/~allwin/farvidss/8024425/webrev.00/ 
<http://cr.openjdk.java.net/%7Eallwin/farvidss/8024423/webrev.00/>

About this change.
I switched from using the SystemDictionary to use ClassLoaderDataGraph 
instead since the SystemDictionary lack information about the 
'anonymous' classes related to this bug.

Previously failed Aurora tests have been run using UTE and verified to 
PASS. The heap dump file have been successfully opened and parsed using 
jhat and eclipse MAT.

Cheers
/Fredrik
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