[jdk11u-dev] RFR: 8268678: LetsEncryptCA.java test fails as Let’s Encrypt Authority X3 is retired

[Christoph Langer]

8268678: LetsEncryptCA.java test fails as Let’s Encrypt Authority X3 is retired

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Commit messages:
 - Backport 58e6e6d919cb15559a61a67805da263be3c9d693

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/56/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=56&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8268678
  Stats: 125 lines in 1 file changed: 11 ins; 9 del; 105 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/56.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/56/head:pull/56

PR: https://git.openjdk.java.net/jdk11u-dev/pull/56