RFR: 8342188: Update tests to use stronger key parameters and certificates

[Fernando Guallini]

Several tests are identified to use weak key parameters (prime modulus, private/public values) and certs with weak keys. As these tests purpose is not to exercise weak keys, these are updated in this PR to use a modulus with 2048-bit, base 2 and certificates with key size 2048

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Commit messages:
 - fixed copyright year and not changing DES
 - initial commit

Changes: https://git.openjdk.org/jdk/pull/21563/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21563&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8342188
  Stats: 2592 lines in 13 files changed: 985 ins; 193 del; 1414 mod
  Patch: https://git.openjdk.org/jdk/pull/21563.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21563/head:pull/21563

PR: https://git.openjdk.org/jdk/pull/21563