added main-controller tests

server/app/controllers/__init__.py

@@ -1,3 +1,9 @@
-from .controller import MainController
+from app.controllers.events import EventController
+from app.controllers.group import GroupController
+from app.controllers.musicians import MusicianController
+from app.controllers.users import UserController
 
-controller = MainController()
+user_controller = UserController()
+event_controller = EventController()
+group_controller = GroupController()
+musicians_controller = MusicianController()