AT:

• dashboard can be added to a collection
• dashboard can be removed from a collection
• given I added a dashboard to a collection when I retrieving a collection then it also contains the dashboard
• when I update a collection with a dashboard id that does not exists then the update throws an error
• when I delete a dashboard, it will be removed from a collection as well
• the delete mechanism works similar to the one for reports. You need to force the delete in order to be complete if there are conflicts.
• the rest-api documentation is adjusted accordingly