fix sessionFeature (move responsibility to session object)

src/main/java/de/thm/arsnova/dao/CouchDBDao.java

@@ -2108,7 +2108,6 @@ public class CouchDBDao implements IDatabaseDao, ApplicationEventPublisherAware
 	@Override
 	public SessionInfo importSession(User user, ImportExportSession importSession) {
 		final Session session = this.saveSession(user, importSession.generateSessionEntity(user));
-		sessionService.changeSessionFeatures(session.getKeyword(), importSession.getSessionFeature());
 		List<Document> questions = new ArrayList<Document>();
 		// We need to remember which answers belong to which question.
 		// The answers need a questionId, so we first store the questions to get the IDs.

src/main/java/de/thm/arsnova/entities/transport/ImportExportSession.java

@@ -45,7 +45,7 @@ public class ImportExportSession {
 
 	private List<Motd> motds;
 
-	private SessionFeature sessionFeature;
+	private SessionFeature sessionFeature = new SessionFeature();
 
 	private SessionInfo sessionInfo;
 
@@ -53,7 +53,6 @@ public class ImportExportSession {
 		questions = new ArrayList<ImportExportQuestion>();
 		feedbackQuestions = new ArrayList<InterposedQuestion>();
 		motds = new ArrayList<Motd>();
-		sessionFeature = null;
 		sessionInfo = null;
 	}
 
@@ -132,6 +131,7 @@ public class ImportExportSession {
 		s.setActive(session.isActive());
 		s.setName(session.getName());
 		s.setShortName(session.getShortName());
+		s.setFeatures(session.getSessionFeature());
 		// public pool
 		if (session.getPublicPool() != null) {
 			// overwrite name and shortname
@@ -236,6 +236,8 @@ public class ImportExportSession {
 
 		private PublicPool publicPool;
 
+		private SessionFeature sessionFeature;
+
 		@ApiModelProperty(required = true, value = "used to display short name")
 		public String getName() {
 			return name;
@@ -271,6 +273,14 @@ public class ImportExportSession {
 		public void setPublicPool(PublicPool publicPool) {
 			this.publicPool = publicPool;
 		}
+
+		public SessionFeature getSessionFeature() {
+			return this.sessionFeature;
+		}
+
+		public void setSessionFeature(SessionFeature sF) {
+			this.sessionFeature = sF;
+		}
 	}
 
 	public static class PublicPool {