Check out notification after deleting other post, user subscribes to own topic, with checked "Auto subscribe"

Pre-condition:

1. User1 and User2 are registered and logged in
2. At least one branch is created
3. At least one topic is created by User1 and he has subscription to the topic
4. At least one comment is left by other user in this topic
5. User1 has checked "Auto subscribe" checkbox in the profile
6. User1 has permission CREATE_POSTS
7. User2 has permission DELETE_OTHERS_POSTS