[jdk11u-dev] RFR: 8272473: Parsing epoch seconds at a DST transition with a non-UTC parser is wrong

[Goetz Lindenmaier]

I backport this for parity with 11.0.15-oracle.

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

Commit messages:
 - Backport fe7d70886cc9985478c5810eff0790648a9aae41

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/688/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=688&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8272473
  Stats: 17 lines in 2 files changed: 10 ins; 1 del; 6 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/688.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/688/head:pull/688

PR: https://git.openjdk.java.net/jdk11u-dev/pull/688