Fix warning of inconsistent namespace redefinitions for xmlns:xacro:

talos_description/robots/talos_arm.urdf.xacro

talos_description/robots/talos_full.urdf.xacro

talos_description/robots/talos_gripper.urdf.xacro

talos_description/robots/talos_head.urdf.xacro

talos_description/robots/talos_lower_body.urdf.xacro

talos_description/robots/talos_lower_body_v1.urdf.xacro

talos_description/robots/talos_lower_body_v2.urdf.xacro

talos_description/robots/talos_torso.urdf.xacro

...escription/urdf/sensors/prosilicaGC655C_camera.urdf.xacro