sort the FCFS list

aman/sys/RecedingHorizonControl.py

@@ -109,6 +109,7 @@ class RecedingHorizonControl:
 
         # check if we found relevant inbounds
         if 0 != len(inbounds):
+            inbounds.sort(key = lambda x: x.InitialArrivalTime)
             return inbounds, earliestArrivalTime
         else:
             return None, None