Images with the same name are overwritte

Following problem:

1. Create a Test in Authoring.
2. Add one Hottext question with a background picture.
3. Add another Hottext question with “Import questions from pool”, containing a DIFFERENT background picture with EXACTLY the same name as the picture from the first Hottext question.
4. The picture from the first Hottext question is now replaced with the picture of the second Hottext question: instead of two Hottext questions with two different picture, you now have two Hottext questions with exactly the same picture.
5. “Export content” of the test: the background picture of the second Hottext question replaced the background picture of the first Hottext question.

Solution: the question needs to be containerised like it is the case if a test is build in the pool.