RFR: 8342188: Update tests to use stronger key parameters and certificates [v7]

[Rajan Halade]

On Thu, 31 Oct 2024 10:33:08 GMT, Fernando Guallini <fguallini at openjdk.org> wrote:

>> 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
>
> Fernando Guallini has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains nine commits:
> 
>  - Merge branch 'master' into 8342188
>  - Address comments
>  - minor changes to update SecurityUtils comments and refactoring
>  - Merge branch 'master' into 8342188
>  - Use hex value for diffieHellmanGroup enum
>  - DHKeyAgreement2.java refactor
>  - DH group reusable
>  - fixed copyright year and not changing DES
>  - initial commit

Marked as reviewed by rhalade (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/21563#pullrequestreview-2408622179