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

[Adam Sotona]

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

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Commit messages:
 - fixed InnerClassLambdaMetafactory for hidden classes

Changes: https://git.openjdk.org/babylon/pull/52/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=52&range=00
  Stats: 12 lines in 3 files changed: 6 ins; 2 del; 4 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