[jdk8u-dev] RFR: 8314960: Add Certigna Root CA - 2

[Severin Gehwolf]

Backport of JDK-8314960 to add new certigna root 2 certificate to OpenJDK 8u. Patch applies cleanly after path shuffling and backporting [JDK-8295894](https://bugs.openjdk.org/browse/JDK-8295894). See https://github.com/openjdk/jdk8u-dev/pull/363

Testing:
- [ ] GHA (still running)
- [x] `jdk/test/security/infra/java/security/cert/CertPathValidator` and  `jdk/test/sun/security/lib/cacerts` jtreg tests. All pass once JDK-8309088 (see #365) is in as well.

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Depends on: https://git.openjdk.org/jdk8u-dev/pull/363

Commit messages:
 - Backport a44f8b059847135ecd0618cb04abbb0d2be1d2d0

Changes: https://git.openjdk.org/jdk8u-dev/pull/366/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=366&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/jdk8u-dev/pull/366.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev.git pull/366/head:pull/366

PR: https://git.openjdk.org/jdk8u-dev/pull/366