RFR: 8342181: Update tests to use stronger Key and Salt size [v9]

[Fernando Guallini]

> Several tests currently use weak key and salt sizes. Since the purpose of these tests is not to evaluate weak keys, they can be updated to use stronger keys length (2048-bits) and stronger Salt (16 bytes). This PR does not intend to update the tests to use stronger algorithms.
> 
> There is no significant increase in tests run time, those still complete consistently fast (few seconds).

Fernando Guallini has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 13 commits:

 - Merge branch 'master' into 8342181
 - simplified getTestKeySize
 - minor changes in SecurityUtils comments and enum moved
 - Merge branch 'master' into 8342181
 - KeyToolTest.java will be updated in another PR
 - Fix algo mistake in SignatureKeyInfo
 - Updated tests that were already using 2048 to use securityUtils instead
 - Convert bits to bytes when necessary
 - Using SecurityUtils to define the keysize and salt size
 - removed test 3072 from SupportedDSAParamGen.java
 - ... and 3 more: https://git.openjdk.org/jdk/compare/9a9ac1d0...7827baa8

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Changes: https://git.openjdk.org/jdk/pull/21537/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21537&range=08
  Stats: 240 lines in 40 files changed: 138 ins; 0 del; 102 mod
  Patch: https://git.openjdk.org/jdk/pull/21537.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21537/head:pull/21537

PR: https://git.openjdk.org/jdk/pull/21537