Pulley asymmetric collision

[Deanna Hood]

As mentioned in Updates page: The pulley_part product's yaw is not distinguishable with perception sensors, but its yaw is evaluated by the scoring algorithm. This will be corrected for, either by making the yaw perceivable or by having the scoring algorithm ignore the yaw.

[Deanna Hood]

fixed in https://bitbucket.org/osrf/ariac/pull-requests/80