[lworld] RFR: 8244231: [lworld] Add support for ref-default and val-default inline classes. [v2]

[Srikanth Adayapalam]

> Code changes and tests

Srikanth Adayapalam has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains eight additional commits since the last revision:

 - Merge branch 'lworld' into JDK-8244231
 - Fix confusingi/unhelpful javadoc per review comments
 - Adjust tests post JDK-8237073
 - Merge branch 'lworld' into JDK-8244231
 - Fix white space problems
 - Fix white space problems
 - Modify several existing tests to verify behavior with reference default classes
 - 8244231: Add support for ref-default and val-default inline classes.

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Changes:
  - all: https://git.openjdk.java.net/valhalla/pull/482/files
  - new: https://git.openjdk.java.net/valhalla/pull/482/files/17d79b7e..f1100617

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=valhalla&pr=482&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=valhalla&pr=482&range=00-01

  Stats: 1338 lines in 74 files changed: 843 ins; 245 del; 250 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/482.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/482/head:pull/482

PR: https://git.openjdk.java.net/valhalla/pull/482