RFR: 8243559: Remove root certificates with 1024-bit keys [v2]

[Sean Mullan]

> This change removes five root certificates with 1024-bit RSA public keys from the system-wide `cacerts` keystore. These are older VeriSign and Thawte root CA certificates which are no longer necessary to retain and should have minimal compatibility risk if removed.
> 
> See the CSR for more details: https://bugs.openjdk.java.net/browse/JDK-8256502

Sean Mullan has updated the pull request incrementally with one additional commit since the last revision:

  Add bugid to @bug.

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/1387/files
  - new: https://git.openjdk.java.net/jdk/pull/1387/files/dd7a3508..dc1c57e2

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=1387&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=1387&range=00-01

  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1387.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1387/head:pull/1387

PR: https://git.openjdk.java.net/jdk/pull/1387