RFR: JDK-8317635: Improve GetClassFields test to verify correctness of field order [v2]

[Alex Menkov]

> All test cases in getclfld007 had 1 (or 0) field in test classes/interfaces.
> The change adds several fields in one of the test classes to verify order of the returned fields (as described by GetClassFields spec).
> Additionally added "printdump" argument to the test agent to make the test more verbose.

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

  get field order from class file

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Changes:
  - all: https://git.openjdk.org/jdk/pull/16131/files
  - new: https://git.openjdk.org/jdk/pull/16131/files/5acbcca8..bd48a0b0

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=16131&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=16131&range=00-01

  Stats: 163 lines in 3 files changed: 58 ins; 57 del; 48 mod
  Patch: https://git.openjdk.org/jdk/pull/16131.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16131/head:pull/16131

PR: https://git.openjdk.org/jdk/pull/16131