changed mt delay again

systemtests/plotter_class.py

@@ -26,7 +26,7 @@ def __init__(self, sim_backend = False):
         self.EPSILON = 0.15 # euclidian distance in [m] between ideal and recorded trajectory under which the drone has to stay to pass the test (NB : epsilon is doubled for multi_trajectory test)
         self.ALLOWED_DEV_POINTS = 0.05  #allowed percentage of datapoints whose deviation > EPSILON while still passing test (currently % for fig8 and 10% for mt)
         self.DELAY_CONST_FIG8 = 1.3 #4.75 #this is the delay constant which I found by adding up all the time.sleep() etc in the figure8.py file. 
-        self.DELAY_CONST_MT = 7
+        self.DELAY_CONST_MT = 5.5
         if self.SIM :                #It allows to temporally adjust the ideal and real trajectories on the graph. Could this be implemented in a better (not hardcoded) way ?
             self.DELAY_CONST_FIG8 = -0.18  #for an unknown reason, the delay constant with the sim_backend is different
         self.ALTITUDE_CONST_FIG8 = 1 #this is the altitude given for the takeoff in figure8.py. I should find a better solution than a symbolic constant ?