Merge branch 'hj/fixSubmissionInfo' into 'master'

Fix : return user.idnumber instead of user.id in user.identifier

See merge request !253

autograde-service/src/main/java/ch/epfl/autograde/api/v1/service/KubernetesJobService.java

@@ -20,7 +20,6 @@ import lombok.extern.slf4j.Slf4j;
 import org.springframework.stereotype.Service;
 
 import java.time.LocalDateTime;
-import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
 import java.util.stream.Collectors;
@@ -297,7 +296,7 @@ public final class KubernetesJobService {
     private String concat_ids(List<User> list){
         String[] users_ids = new String[list.size()];
         for(int i=0; i<list.size() ; i++ ){
-            users_ids[i] = String.valueOf(list.get(i).id());
+            users_ids[i] = list.get(i).idnumber();
         }
         return String.join("-",users_ids);
 
@@ -323,7 +322,7 @@ public final class KubernetesJobService {
         final var labels = Map.of(
                 "autograde.version", autograde.getVersion(),
                 "course.short-name", KubernetesPreprocessor.preprocessLabel(request.course().shortName()),
-                "user.identifier", KubernetesPreprocessor.preprocessLabel(request.user().identifier()),
+                "user.identifier", KubernetesPreprocessor.preprocessLabel(concat_ids(request.users())),
                 "assignment.id", KubernetesPreprocessor.preprocessLabel(valueOf(request.assignment().id())),
                 "submission.id", KubernetesPreprocessor.preprocessLabel(valueOf(request.submission().id())),
                 "submission.attempt", KubernetesPreprocessor.preprocessLabel(valueOf(request.submission().attempt()))