RFR: 8342183: Update tests to use stronger algorithms and keys [v5]

[Fernando Guallini]

> Several tests are identified to use weak/legacy algorithms. As these tests purpose is not to exercise weak algorithms, these are updated in this PR to use stronger algorithms. If the test uses a weak key, it is updated as well.

Fernando Guallini has updated the pull request incrementally with one additional commit since the last revision:

  reintroduce library /test/lib in SignerOrder

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Changes:
  - all: https://git.openjdk.org/jdk/pull/21578/files
  - new: https://git.openjdk.org/jdk/pull/21578/files/081b7cd1..948a14e1

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21578&range=04
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21578&range=03-04

  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/21578.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21578/head:pull/21578

PR: https://git.openjdk.org/jdk/pull/21578