Fix for #7654: Count unanswered variant questions
Merge remote-tracking branch 'origin/issue-6674' into issue-6674
Check if user is in speaker role and is session owner
Check user before allowing setActive
Check for user rola and session ownership
Merge branch 'master'
Check for session ownership only to prefent other issues due to role ownership bugs
Bugfix: Audience is allowed to send questions to system
Delete all interposed questions with one request
Merge branch 'master' into issue-6674

Conflicts:
	src/main/java/de/thm/arsnova/dao/CouchDBDao.java
	src/main/java/de/thm/arsnova/dao/IDatabaseDao.java
	src/main/java/de/thm/arsnova/services/IQuestionService.java
	src/main/java/de/thm/arsnova/services/QuestionService.java
	src/test/java/de/thm/arsnova/dao/StubDatabaseDao.java
Merge remote-tracking branch 'origin/issue-6674' into issue-6674