<i18n dev> RFR: 8282929: Localized monetary symbols are not reflected in `toLocalizedPattern` return value

[Naoto Sato]

`DecimalFormat.toLocalizedPattern()` was not honoring the monetary decimal/grouping separator symbols. Fix is straightforward to use the correct symbols depending on the formatter type.

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Commit messages:
 - 8282929: Localized monetary symbols are not reflected in `toLocalizedPattern` return value

Changes: https://git.openjdk.java.net/jdk/pull/7790/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7790&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8282929
  Stats: 70 lines in 2 files changed: 65 ins; 0 del; 5 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7790.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7790/head:pull/7790

PR: https://git.openjdk.java.net/jdk/pull/7790