Merge branch 'fpga_acce_wiki' into 'master'

...id5000/sites/grenoble/clusters/servan/nodes/servan-1.json

...id5000/sites/grenoble/clusters/servan/nodes/servan-2.json

data/grid5000/sites/grenoble/clusters/servan/servan.json

...d5000/sites/nancy/clusters/graphite/nodes/graphite-1.json

...d5000/sites/nancy/clusters/graphite/nodes/graphite-2.json

...d5000/sites/nancy/clusters/graphite/nodes/graphite-3.json

...d5000/sites/nancy/clusters/graphite/nodes/graphite-4.json

...id5000/sites/grenoble/clusters/servan/nodes/servan-1.yaml

...id5000/sites/grenoble/clusters/servan/nodes/servan-2.yaml

input/grid5000/sites/grenoble/clusters/servan/servan.yaml

...rid5000/sites/nancy/clusters/graphite/graphite_extra.yaml

lib/refrepo/gen/wiki/generators/hardware.rb

lib/refrepo/gen/wiki/generators/site_hardware.rb

lib/refrepo/input_loader.rb

lib/refrepo/valid/input/schemas/schema-node.yaml