[code-reflection] RFR: Change the model of the default label of switch [v2]

[Mourad Abbay]

> Model the default label of switch as a body that yield true, this makes the modeling consistent for all labels.

Mourad Abbay has updated the pull request incrementally with one additional commit since the last revision:

  Fix NullTest

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Changes:
  - all: https://git.openjdk.org/babylon/pull/223/files
  - new: https://git.openjdk.org/babylon/pull/223/files/0a332309..c0f04b79

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=babylon&pr=223&range=01
 - incr: https://webrevs.openjdk.org/?repo=babylon&pr=223&range=00-01

  Stats: 27 lines in 2 files changed: 8 ins; 0 del; 19 mod
  Patch: https://git.openjdk.org/babylon/pull/223.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/223/head:pull/223

PR: https://git.openjdk.org/babylon/pull/223