#1162 - Replace Coveralls with JaCoCo

[sigee]

For all changes:

• [X] Is there a issue associated with this PR? Is it referenced in the commit message?

• [X] Does your PR title start with #XXXX where XXXX is the issue number you are trying to resolve?

• [X] Has your PR been rebased against the latest commit within the target branch (typically main)?

• [X] Is your initial contribution a single, squashed commit?

• [X] Is the code properly formatted with mvn git-code-format:format-code -Dgcf.globPattern="**/*" -Dskip.format.code=false?

For code changes:

• [X] Have you ensured that the full suite of tests is executed via mvn clean verify?
• [ ] Have you written or updated unit tests to verify your changes?
• [ ] If adding new dependencies to the code, are these dependencies licensed in a way that is compatible for inclusion under ASF 2.0?
• [ ] If applicable, have you updated the LICENSE file, including the main LICENSE file?
• [ ] If applicable, have you updated the NOTICE file, including the main NOTICE file?
• [X] If applicable, have you updated the README file, including the main README file?

Note:

I chceked the current coverage in every module and set the minimum threshold for the curent values. From now the build will be failed if the coverage drops, but the threshold should be updated time to time if the coverage is increased.