- Remove redundant uses of WrapperMock
- Use assertThat() from JUnit, not hamcrest
- Use hamcrest Matchers everywhere (not BaseMatchers etc.)
- Favor Mockito's argThat() over using ArgumentCaptor (more succinct)
- Delete useless test classes
- Change interface to use (CommandSender, List<String> arguments)
- Use CommandArgumentDescription#name instead of "label" (to prevent confusion between command labels and arguments)
- Simplify command difference computation in CommandHandler (no longer consider argument difference)
- Change AuthMeMockUtils (reflection-based test setup) to ReflectionUtils: service providing reflection functionalities for particular tests where it is appropriate;
- Initialize the data folder (required as soon as the Settings class is loaded) immediately in WrapperMock. Some tests did not set it up that required it and it goes unnoticed if the test is not run individually. This will hopefully fix the tests from failing in the Jenkins build.
