RFR: 8327261: Parsing test for Double/Float succeeds w/o testing all bad cases

[Naoto Sato]

Fixing test cases. For bad test cases, only the first case was run, and the rest were ignored.

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Commit messages:
 - initial commit

Changes: https://git.openjdk.org/jdk/pull/18113/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18113&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8327261
  Stats: 10 lines in 2 files changed: 0 ins; 4 del; 6 mod
  Patch: https://git.openjdk.org/jdk/pull/18113.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18113/head:pull/18113

PR: https://git.openjdk.org/jdk/pull/18113