Implement throttle stream in MotoServer

MotorControl/MotorServer.py

@@ -15,12 +15,17 @@ class MotorServicer(motorService_pb2_grpc.CarControlServicer):
         self.servo = Servo(servo_pin)
         self._timer = None
 
-    def SetThrottle(self, request, context):
+    def SetThrottle(self, request_iterator, context):
                 # If we don't get a response every 3 seconds, stop the car.
         # This isn't a stream right now, however may change it to be so since we'll constantly
         # be sending values...
+        throttleFailed = False
+        for throttleRequest in request_iterator:
             self.set_timeout(timeout_length)
-        return motorService_pb2.ThrottleResponse(throttleSet = (True if self.motor.set_throttle(request.throttle) else False))
+            throttleFailed = self.motor.set_throttle(throttleRequest.throttle)
+            if throttleFailed:
+                break
+        return motorService_pb2.ThrottleResponse(throttleSet = throttleFailed)
 
     def SetSteering(self, request, context):
         # TODO: Fix this to use the motor object as well to check for bounds.