Merge branch 'strasbourg_gw' into 'master'

...trasbourg/clusters/fleckenstein/nodes/fleckenstein-1.json

...rasbourg/clusters/fleckenstein/nodes/fleckenstein-10.json

...trasbourg/clusters/fleckenstein/nodes/fleckenstein-2.json

...trasbourg/clusters/fleckenstein/nodes/fleckenstein-3.json

...trasbourg/clusters/fleckenstein/nodes/fleckenstein-4.json

...trasbourg/clusters/fleckenstein/nodes/fleckenstein-5.json

...trasbourg/clusters/fleckenstein/nodes/fleckenstein-6.json

...trasbourg/clusters/fleckenstein/nodes/fleckenstein-7.json

...trasbourg/clusters/fleckenstein/nodes/fleckenstein-8.json

...trasbourg/clusters/fleckenstein/nodes/fleckenstein-9.json

...00/sites/strasbourg/network_equipments/gw-strasbourg.json

input/grid5000/ipv4.yaml

.../sites/strasbourg/clusters/fleckenstein/fleckenstein.yaml

input/grid5000/sites/strasbourg/networks/gw-strasbourg.yml