remove ROS_IP hack that assumed iproute2 was installed
remove ROS_IP hack that assumed iproute2 was installed

davetcoleman/sdk-examples,Sannoso/baxter_examples,RethinkRobotics/baxter_examples,baxter-flowers/baxter_tools,umassrobotics/baxter,wjchen84/baxter_examples,davetcoleman/sdk-examples,umassrobotics/baxter,jaspell/baxter_examples,RethinkRobotics/baxter_tools,RethinkRobotics/baxter