[code-reflection] RFR: Fix lambda bugs

[Mourad Abbay]

Fix lambda bugs:
1. Unnecessary load of static fields accessed inside the lambda body (bug 1).
2. The model of a lambda expression that returns void, contains additional boxing whose result is not used (bug 2).
3. Inner lambda is incorrectly quoted (bug 3).

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Commit messages:
 - Merge branch 'code-reflection' into lambda-bugs
 - Fix lambda bug 1

Changes: https://git.openjdk.org/babylon/pull/532/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=532&range=00
  Stats: 4 lines in 1 file changed: 4 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/babylon/pull/532.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/532/head:pull/532

PR: https://git.openjdk.org/babylon/pull/532