AOP-43 | add Rest Tests

[KlnSdr]

• add an annotation based loader similar to the httprouteloader (see #37 for reference) for the test
• the annotation should take the name of the test as parameter
• each test should return if it was successful or not
• the test executor should keep track of the tests run and the number of successful/failed tests and print a summary at the end

  review

• [ ] requirements per ticket definition are met or a reason was stated if they were only partially met
• [ ] code style was adhered to
• [ ] feature branche is rebased

[KlnSdr]

• TestRunner extends the custom Classloader
• the Annotation Test takes the name of the test as a parameter
• i added tests for /newGame and /join and created a ticket to add tests for the other routes
• if needed we can call and i explain the code