RFR: 8294307: ISO 4217 Amendment 173 Update

[Justin Lu]

Problem: Amendment number outdated

Fix: Update amendment number + date in properties file and test case data file

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Commit messages:
 - Update amendment number in test case data file
 - Update amendment number

Changes: https://git.openjdk.org/jdk/pull/10499/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10499&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8294307
  Stats: 4 lines in 2 files changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/10499.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10499/head:pull/10499

PR: https://git.openjdk.org/jdk/pull/10499