[code-reflection] RFR: InnerClassLambdaMetafactory fix of hidden classes handling [v6]

[Adam Sotona]

> FYI: I'm going to fill a bug and propose similar fix to JDK main

Adam Sotona has updated the pull request incrementally with one additional commit since the last revision:

  Reverted Lambda.java

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Changes:
  - all: https://git.openjdk.org/babylon/pull/52/files
  - new: https://git.openjdk.org/babylon/pull/52/files/0083ddfd..1b769ac6

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=babylon&pr=52&range=05
 - incr: https://webrevs.openjdk.org/?repo=babylon&pr=52&range=04-05

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/babylon/pull/52.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/52/head:pull/52

PR: https://git.openjdk.org/babylon/pull/52