<i18n dev> RFR: 8285844: TimeZone.getTimeZone(ZoneOffset) does not work for all ZoneOffsets and returns GMT unexpected [v2]

[Naoto Sato]

> This is to extend the `Custom ID`s in `java.util.TimeZone` class to support second-level resolution, enabling round trips with `java.time.ZoneOffset`s. Corresponding CSR is also being drafted.

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

  Fixed offsets in milliseconds, added test variations, refined Custom ID definitions

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/8606/files
  - new: https://git.openjdk.java.net/jdk/pull/8606/files/843e86be..81a806e5

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=8606&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=8606&range=00-01

  Stats: 13 lines in 2 files changed: 3 ins; 0 del; 10 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8606.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8606/head:pull/8606

PR: https://git.openjdk.java.net/jdk/pull/8606