Implement event priority

This supports the ability to add a priority to events, to either skip them, or have them stop all running events in the same maneuver.

• Added converter for NET_ASAM_OPENSCENARIO::v1_3::Priority
• Added EventPriority to EventNode
• Created an EventPrioritizer, which is created on the Maneuver node level, and passed to Events via the blackboard.
  • Created a ManeuverNode, which creates the EventPrioritizer on the blackboard, and synchronizes the EventPrioritizer to determine if events should be overridden.
  • Modified EventNode to check with the EventPrioritizer, to determine whether the event should be started or stopped.

The effect of the priority enumeration is given in the ASAM standard:

	Name	Applied Stereotypes	Description
D	overwrite	deprecated	If a starting event has priority Overwrite, all events in running state, within the same scope (maneuver) as the starting event, should be issued a stop command (stop transition).
	override		If a starting event has priority Override, all events in running state, within the same scope (maneuver) as the starting event, should be issued a stop command (stop transition).
	parallel		Execute in parallel to other events.
	skip		If a starting event has priority Skip, then it will not be ran if there is any other event in the same scope (maneuver) in the running state.