[code-reflection] RFR: Fix test

[Paul Sandoz]

Fix broken test (related to encoding line information in models).

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Commit messages:
 - Fix test

Changes: https://git.openjdk.org/babylon/pull/69/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=69&range=00
  Stats: 33 lines in 1 file changed: 27 ins; 4 del; 2 mod
  Patch: https://git.openjdk.org/babylon/pull/69.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/69/head:pull/69

PR: https://git.openjdk.org/babylon/pull/69