Added arping package
Added arping package

scaleway-community/scaleway-docker,moul/image-app-docker,innovate-technologies/scaleway-dispatch,meyskens/scaleway-docker,QuentinPerez/image-app-docker,moul/scaleway-ubuntu-coreos,scaleway-community/scaleway-docker,scaleway-community/scaleway-ubuntu-coreos,scaleway/image-app-docker,moul/scaleway-ubuntu-coreos,scaleway-community/scaleway-ubuntu-coreos