Multiple practices - add missing queue_size parameter to publishers

[geopimik]

When running your nodes, I get these error messages in console:

autoware_mini_practice/src/practice_6/nodes/planning/global/lanelet2_global_planner.py:52: SyntaxWarning: The publisher should be created with an explicit keyword argument 'queue_size'. Please see http://wiki.ros.org/rospy/Overview/Publishers%20and%20Subscribers for more information.
  self.waypoints_pub = rospy.Publisher('global_path', Lane, latch=True)

autoware_mini_practice/src/practice_6/nodes/control/pure_pursuit_follower.py:28: SyntaxWarning: The publisher should be created with an explicit keyword argument 'queue_size'. Please see http://wiki.ros.org/rospy/Overview/Publishers%20and%20Subscribers for more information.
  self.vehicle_cmd_pub = rospy.Publisher('/control/vehicle_cmd', VehicleCmd)

• please add the queue_size=1 parameter to publishers
• need to fix it in multiple practices

[Karljohan99]

Done in dc273e1

[geopimik]

OK