RFR: 8281267: VM HeapDumper dumps array classes several times [v3]

[Alex Menkov]

> ClassLoaderDataGraph::classes_do description says:
> // Walking classes through the ClassLoaderDataGraph include array classes.
> So do_load_class callback should not dump arrays for the classes and dumper doesn't need to call Universe::basic_type_classes_do (array classes for primitive types are also reported by ClassLoaderDataGraph::classes_do)

Alex Menkov has updated the pull request incrementally with one additional commit since the last revision:

  reworked do_class_dump

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/7384/files
  - new: https://git.openjdk.java.net/jdk/pull/7384/files/604b4f88..173a8da8

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=7384&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=7384&range=01-02

  Stats: 96 lines in 1 file changed: 11 ins; 58 del; 27 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7384.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7384/head:pull/7384

PR: https://git.openjdk.java.net/jdk/pull/7384