RFR: 8279185: Support for IsoFields in JapaneseDate/MinguoDate/ThaiBuddhistDate [v5]

[Naoto Sato]

> Supporting `IsoFields` temporal fields in chronologies that are similar to ISO chronology. Corresponding CSR has also been drafted.

Naoto Sato has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 11 additional commits since the last revision:

 - abstract class -> top level interface
 - interface -> abstract class
 - Merge branch 'master' into JDK-8279185
 - Removed the method
 - Merge branch 'master' into JDK-8279185
 - Changed to use a type to determine ISO based or not
 - Renamed the new method
 - Merge branch 'master' into JDK-8279185
 - Addresses review comments
 - copyright year fix
 - ... and 1 more: https://git.openjdk.java.net/jdk/compare/488250f0...7f596789

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/7683/files
  - new: https://git.openjdk.java.net/jdk/pull/7683/files/530ed40e..7f596789

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=7683&range=04
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=7683&range=03-04

  Stats: 302965 lines in 3965 files changed: 219208 ins; 39068 del; 44689 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7683.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7683/head:pull/7683

PR: https://git.openjdk.java.net/jdk/pull/7683