change datetime.now to datetime.utcnow;

fix test_ifeed test;

components/i_feed/devices/traffic_light.py

@@ -90,7 +90,7 @@ class TrafficLight:
         self.current_color = TrafficLightColor((self._starting_color.value - 1) % num_colors)
         while self.running:
             self.current_color = TrafficLightColor((self.current_color.value + 1) % num_colors)
-            self.last_switch = datetime.now()
+            self.last_switch = datetime.utcnow()
             self.send_status_update()
             time.sleep(self.switching_time / SCALING)
 

components/i_feed/devices/vehicle.py

@@ -168,7 +168,7 @@ class Vehicle:
 
         # Get old and updated timestamps
         old_timestamp = self.last_update
-        updated_timestamp = datetime.now()
+        updated_timestamp = datetime.utcnow()
         self.last_update = updated_timestamp
 
         # get driving time between timestamps (in seconds)
@@ -201,7 +201,7 @@ class Vehicle:
         informs the message broker about the current state (DAF) of the vehicle.
         """
         print('{} starts driving ... SCALING: x{}\n\n'.format(self.vin, SCALING))
-        self.last_update = datetime.now()
+        self.last_update = datetime.utcnow()
         self._driven_kms = 0
 
         self._t = threading.Thread(target=self.drive)
@@ -266,7 +266,7 @@ class Vehicle:
         print('\n\nEnd of route reached ... resetting and restarting vehicle')
         self._gps_location = self._starting_point
         self._driven_kms = 0
-        self.last_update = datetime.now()
+        self.last_update = datetime.utcnow()
         self.nce = False
         self.velocity = STARTING_VELOCITY