[jdk13u-dev] Integrated: 8243321: Add Entrust root CA - G4 to Oracle Root CA program

[Yuri Nesterenko]

The fix makes 13u closer to LTS releases and 15u, cacerts-wide. Applies clean. Tests run OK (well, for test/jdk/sun/security/lib/cacerts/VerifyCACerts.java to fully pass at this moment we need to exclude 5 1024-bit certificates). 
The follow-up will be 8243320.

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Commit messages:
 - Backport 6e323383307da768f9b91906f07d3221580ac180

Changes: https://git.openjdk.java.net/jdk13u-dev/pull/122/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk13u-dev&pr=122&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8243321
  Stats: 217 lines in 3 files changed: 198 ins; 3 del; 16 mod
  Patch: https://git.openjdk.java.net/jdk13u-dev/pull/122.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk13u-dev pull/122/head:pull/122

PR: https://git.openjdk.java.net/jdk13u-dev/pull/122