This has changed maven coordinates to the jakarta project, though the
code is binary compatible still.

* [JENKINS-61479] Fix a bug in FingerprintCleanupThread and add tests.

* Upgraded Hamcrest to Version 2.2. Incorporated Hamcrest assertion for FingerprintCleanupThread tests.

* Blank line removed

* Changed timestamp_millis->Date; Removed unused imports

* Added hamcrest version as a property

* Changed to assert log output

* Delete ConfidentialStoreRule

* Also delete MockSecretRule so Secret.fromString works

* Secret.SECRET still referenced by SecretHelper in jenkins-test-harness, used by RekeySecretAdminMonitorTest, also copied in publish-over-*-plugin

* RSAConfidentialKey ought to use the same SecureRandom as the ConfidentialStore; this also lets the mock use a fixed seed

* For now ConfidentialStore.secureRandom can be abstract

* Some core unit tests can be rather verbose; set maven.test.redirectTestOutputToFile

* Looks like we need a ConfidentialStoreRule after all

* Restored another couple of usages