RFR: 8342188: Update tests to use stronger key parameters and certificates [v6]

[Anthony Scarpino]

On Thu, 24 Oct 2024 09:27:21 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 incrementally with one additional commit since the last revision:
> 
>   Address comments

Marked as reviewed by ascarpino (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/21563#pullrequestreview-2405996817