[code-reflection] RFR: 8337158: Modeling and lowering of switch statement

[Mourad Abbay]

Modeling and lowering of switch statement.

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Commit messages:
 - Model switch statement

Changes: https://git.openjdk.org/babylon/pull/211/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=211&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8337158
  Stats: 233 lines in 3 files changed: 212 ins; 19 del; 2 mod
  Patch: https://git.openjdk.org/babylon/pull/211.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/211/head:pull/211

PR: https://git.openjdk.org/babylon/pull/211