RFR: 8254982: (tz) Upgrade time-zone data to tzdata2020c [v2]

[Kiran Sidhartha Ravikumar]

> Hi Guys,
> 
> Please review the integration of tzdata2020c to JDK.
> 
> Details regarding the change can be viewed at - https://mm.icann.org/pipermail/tz-announce/2020-October/000060.html
> Bug: https://bugs.openjdk.java.net/browse/JDK-8254982
> 
> Along with it, there is a test fix for https://bugs.openjdk.java.net/browse/JDK-8254865, With tzdata2020b, the test
> fails for the mentioned zones expecting "PST" but JDK has Zone names for "MST" for JRE locale provider. Since the
> purpose of the test is to get any GMT-08:00 time zone, I have excluded those zones from the test.  Please let me know
> if the changes are good to push.
> Thanks,
> Kiran

Kiran Sidhartha Ravikumar 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 three
additional commits since the last revision:

 - 8254982: Adding comments for removal of zones in BasicDateTime.java
 - Merge remote-tracking branch 'origin/master' into JDK-8254982
 - 8254982: (tz) Upgrade time-zone data to tzdata2020c

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/747/files
  - new: https://git.openjdk.java.net/jdk/pull/747/files/7bd51537..7434663a

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=747&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=747&range=00-01

  Stats: 26902 lines in 293 files changed: 17268 ins; 8054 del; 1580 mod
  Patch: https://git.openjdk.java.net/jdk/pull/747.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/747/head:pull/747

PR: https://git.openjdk.java.net/jdk/pull/747