JUnit5 test classes and methods should have default package visibility

[steve-todorov]

Task Description

With JUnit5 you don't need to use public classes and methods anymore.
SonarQube complains about this now.

Tasks

The following tasks will need to be carried out:

• Go over the reported list in Sonar and remove the public modifier.
• Submit a PR (chore)

Task Relationships

This task:

• Is a sub-task of: #
• Depends on: #
• Is a follow-up of: #
• Relates to: #

Help

• Our chat channel
• Points of contact:
  • @carlspring
  • @steve-todorov