Leere Testklassen erstellt
getTopics and getMessageByTopic are tested
Ich habe gemacht
createUser is tested
updated CreateUserTest
deleteUser is tested, getUsers is not yet finished testing
updated GetUsersTest (is now finished testing)
changed 1 letter in a comment
Merge remote-tracking branch 'origin/kinmin'

Conflicts:
	src/test/java/de/htw_berlin/f4/ai/kbe/kurznachrichten/TestShortMessageServiceInit.java