Resolve "Refactor Methods in RequestTableService"

Moved the methods in RequestTableService into different services that the methods fit in better.

Changed:

• SessionStatusService -> labreqCounts added from reqtableservice
• RoleDTOService -> getAssistantsFromeditions added from reqtableservice
• LabService -> getSessionDetailsFromLabs (from ReqTableService), getLabsFromEditions (from ReqTableService)
• AssignmentService created -> countRequestsPerAssignment (from EditionStatusService), getAssignmentsFromEditions (from ReqTableService), assignmentsWithCourseCodes (from ReqTableService) -> more methods from LabService can be added to make LabService shorter
• RoomDTOService -> getRoomsFromSessions added (from requestTableService)

Closes #695 (closed)

src/main/java/nl/tudelft/queue/controller/EditionStatusController.java

@@ -37,6 +37,7 @@ import nl.tudelft.queue.model.LabRequest;
 import nl.tudelft.queue.model.enums.RequestStatus;
 import nl.tudelft.queue.model.enums.RequestType;
 import nl.tudelft.queue.model.labs.Lab;
+import nl.tudelft.queue.service.AssignmentService;
 import nl.tudelft.queue.service.EditionStatusService;
 
 @Validated
@@ -45,6 +46,8 @@ public class EditionStatusController {
 
 	@Autowired
 	private EditionStatusService ess;
+	@Autowired
+	public AssignmentService as;
 
 	/**
 	 * Creates and returns the data for a histogram regarding the status of requests over time. The data for
@@ -134,7 +137,7 @@ public class EditionStatusController {
 				ess.countDistinctAssistants(requests),
 				ess.countWhere(requests, r -> r.getEventInfo().getStatus().isPending()),
 				ess.countWhere(requests, r -> r.getEventInfo().getStatus().isHandled()),
-				ess.mostCountedName(ess.countRequestsPerAssignment(assignments, requests)),
+				ess.mostCountedName(ess.as.countRequestsPerAssignment(assignments, requests)),
 				ess.mostCountedName(ess.countRequestsPerRoom(rooms, requests)),
 				ess.averageWaitingTime(requests),
 				ess.averageProcessingTime(requests));
@@ -160,7 +163,7 @@ public class EditionStatusController {
 			@RequestParam(required = false, defaultValue = "") List<RequestType> type) {
 		List<LabRequest> requests = ess.getFilteredRequests(labs, assignments, rooms, type);
 
-		return ess.countRequestsPerAssignment(assignments, requests);
+		return as.countRequestsPerAssignment(assignments, requests);
 	}
 
 	/**