Fixing code tools 2

[judovana]

https://ci.adoptium.net/view/Dependencies/job/dependency_pipeline/898/ jcov failed to build, as its tip picekd up jdk8, but jcov tip no longer is able to build with jdk8, but needs 11 and up.

Also javatest-* (only javatest.jar had) and sigtest zips were missing hashes. That should be fixed now:
https://ci.adoptium.net/view/Dependencies/job/dependency_pipeline/898/artifact/sigtest/
https://ci.adoptium.net/view/Dependencies/job/dependency_pipeline/898/artifact/jtharness/

[github-actions]

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[sxa]

Approving as this should fix a break in https://ci.adoptium.net/view/Dependencies/job/dependency_pipeline/