cloud_config: Stop mounting the netns directory
cloud_config: Stop mounting the netns directory

We no longer need the host's netns directory to operate properly, so
this patch stops mounting it in the minion container.

ejj/quilt-dev,stevenlin598/quilt,kklin/kelda,kklin/kelda,tejasmanohar/quilt,LuiseV/quilt,NetSys/quilt,tejasmanohar/quilt,quilt/quilt,kklin/kelda,LuiseV/quilt,kayousterhout/quilt,kelda/kelda,kklin/kelda,quilt/quilt,mmussomele/quilt,stevenlin598/quilt,PenguinToast/quilt,kelda/kelda,kklin/quilt,kklin/quilt,kayousterhout/quilt,kklin/quilt,stevenlin598/quilt,PenguinToast/quilt,stevenlin598/quilt,LuiseV/quilt,quilt/quilt,NetSys/quilt,kelda/kelda,mmussomele/quilt,mmussomele/quilt,kayousterhout/quilt,NetSys/quilt,quilt/quilt,PenguinToast/quilt,mmussomele/quilt,ejj/quilt-dev,stevenlin598/quilt,ejj/quilt-dev,ejj/quilt-dev,mmussomele/quilt,stevenlin598/quilt,kklin/quilt,PenguinToast/quilt,tejasmanohar/quilt,LuiseV/quilt,kayousterhout/quilt,mmussomele/quilt,NetSys/quilt,LuiseV/quilt,kelda/kelda,PenguinToast/quilt,tejasmanohar/quilt,NetSys/quilt