RFR: 8316974: ListFormat creation is unsuccessful for some of the supported Locales [v2]

[Naoto Sato]

> Some CLDR locales have partial list patterns, such as only the "end" pattern, and expect "start" and "middle" patterns to be inherited from parent locales. Made the code capable of the inheritance.

Naoto Sato has updated the pull request incrementally with one additional commit since the last revision:

  Fixed cache

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Changes:
  - all: https://git.openjdk.org/jdk/pull/15935/files
  - new: https://git.openjdk.org/jdk/pull/15935/files/af695c6e..623d029f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15935&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15935&range=00-01

  Stats: 3 lines in 2 files changed: 1 ins; 1 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/15935.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15935/head:pull/15935

PR: https://git.openjdk.org/jdk/pull/15935