My_motor: changed speed to get and put VELO rbv as Motor.slew_speed was not working

src/aare/devices/my_motor.py

@@ -10,12 +10,12 @@ class MyMotor(Motor):
     @property
     def speed(self):
         """Gets the current motor.slew_speed value"""
-        return self.slew_speed
+        return self.get('VELO')
 
     @speed.setter
     def speed(self, v):
         """Sets the motor slew speed"""
-        self.slew_speed = v
+        self.put('VELO', v)
 
     @property
     def position(self):