add the assignment to the runway sequencing

aman/config/RunwaySequencing.py

@@ -12,3 +12,6 @@ class RunwaySequencing:
     def __init__(self, runway : Runway):
         self.Runway = runway
         self.Spacing = 3
+        self.ShallAssignments = {}
+        self.ShouldAssignments = {}
+        self.MayAssignments = {}