[sophia][esterel6] add cluster esterel6

[sophia][esterel6] add basic metrics

[sophia][esterel6] update postinstall version

[sophia][esterel6] Add new cluster esterel6

[esterel6][dhcp] Change Mac@ eth0

[sophia][esterel6] Add disk path

[sophia][esterel6] G5K import

[sophia][esterel6] fix merge error in json

[esterel6][sophia] Regenerate json