[code-reflection] RFR: Fix lambda bugs [v8]

[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).

Mourad Abbay 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 10 additional commits since the last revision:

 - Merge branch 'code-reflection' into lambda-bugs
 - Apply review comments
 - Clarify comment
 - Fix bug 3
 - Add test cases to ensure bug 2 is fixed
 - Fix bug 2
 - Fix the bug of lambda model containing ReturnOp with value even though the lambda return type is void
 - Add test case to ensure bug 1 is fixed
 - Merge branch 'code-reflection' into lambda-bugs
 - Fix lambda bug 1

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Changes:
  - all: https://git.openjdk.org/babylon/pull/532/files
  - new: https://git.openjdk.org/babylon/pull/532/files/23f1914c..77f2c779

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=babylon&pr=532&range=07
 - incr: https://webrevs.openjdk.org/?repo=babylon&pr=532&range=06-07

  Stats: 1577 lines in 48 files changed: 738 ins; 441 del; 398 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