Do not specify "associate" for unknown reports of VRP
At the moment just VRP specifies "associate": True for common attributes of Unknown reports while this is not necessary (Unknown marks are usually associated by component names and log patterns). There is some workaround in Bridge to avoid this, but it does not work well at the moment. Indeed, it should not work at all. Core is responsible for providing attributes to be associated by marks and attributes that should not be associated by marks (by default).