Log motion plan failures

src/active_grasp/controller.py

@@ -152,6 +152,8 @@ class GraspController:
             rospy.sleep(1.0)  # Wait to see whether the object slides out of the hand
             success = self.gripper.read() > 0.002
             return "succeeded" if success else "failed"
+        else:
+            return "no_motion_plan_found"
 
     def create_collision_scene(self):
         # Segment support surface