#63 feat: implement login for rocketChat api; add new fields for rocketChat information to user database

#40 feat: adding mysql connect as injection, feat: implementing in memory database for tests, move fltrail.sql to test/resources/database, so it can be used in test for building the inmemory database

#40 moving fltrail.sql script to test resource folder to use it automatically for test database creation

* and removed in front end

Id was replaced by a composite primary key

feat: workRating for peers are written to DB
feat: 2 new tables in DB

feat: db reworked for quizzes.

fix: fix naming for Project active
feat: implement getUserByField/getUserByEmail/getProjectById
refactor: camelcase for adminPassword

email have to be unique, because it identifies a user