Update "driver" nodes to use namespace command line argument

src/cs4313_utilities/robot_driver.py

 #!/usr/bin/env python3
 
+import sys
 import rospy
 import cs4313_utilities.robot as robot
 
@@ -9,7 +10,13 @@ import cs4313_utilities.robot as robot
 if __name__ == "__main__":
     rospy.init_node('robotNode')
 
-    robot = robot.SimpleRobot()
+    ns = ""
+    for argNum in range(len(sys.argv)-1):
+        if ((sys.argv[argNum] == '-n') or (sys.argv[argNum] == '--ns') or \
+            (sys.argv[argNum] == '--namespace')):
+            ns = sys.argv[argNum + 1]
+
+    robot = robot.SimpleRobot(namespace=ns)
 
     # Just some canned waypoints for testing
     waypointList = [[5.0, 5.0], [-10.0, 5.0], [-5.0, -5.0], [10.0, -5.0], [0.0, 0.0] ]