[jdk11u] RFR: 8314960: Add Certigna Root CA - 2

[Martin Doerr]

Backport of [JDK-8314960](https://bugs.openjdk.org/browse/JDK-8314960) taken from 17u: https://github.com/openjdk/jdk17u/commit/a44f8b059847135ecd0618cb04abbb0d2be1d2d0

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Commit messages:
 - Backport a44f8b059847135ecd0618cb04abbb0d2be1d2d0

Changes: https://git.openjdk.org/jdk11u/pull/81/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u&pr=81&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8314960
  Stats: 568 lines in 4 files changed: 338 ins; 227 del; 3 mod
  Patch: https://git.openjdk.org/jdk11u/pull/81.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u.git pull/81/head:pull/81

PR: https://git.openjdk.org/jdk11u/pull/81