Resolve "IsMotion used in Problem::getState()"

Closes #399 (closed)

demos/hello_wolf/yaml/processor_odom_2d.yaml

@@ -10,3 +10,6 @@ keyframe_vote:
   max_buff_length:    999
   cov_det:            999
 apply_loss_function: true
+
+state_getter: true
+state_priority: 1