[environments] Add new squeeze reference envs

data/grid5000/environments/squeeze-x64-base-1.8.json

data/grid5000/environments/squeeze-x64-big-1.10.json

data/grid5000/environments/squeeze-x64-min-1.10.json

data/grid5000/environments/squeeze-x64-nfs-1.10.json

data/grid5000/environments/squeeze-x64-xen-1.8.json

...000/sites/grenoble/environments/squeeze-x64-base-1.8.json

...000/sites/grenoble/environments/squeeze-x64-big-1.10.json

...000/sites/grenoble/environments/squeeze-x64-min-1.10.json

...000/sites/grenoble/environments/squeeze-x64-nfs-1.10.json

...5000/sites/grenoble/environments/squeeze-x64-xen-1.8.json

...id5000/sites/lille/environments/squeeze-x64-base-1.8.json

...id5000/sites/lille/environments/squeeze-x64-big-1.10.json

...id5000/sites/lille/environments/squeeze-x64-min-1.10.json

...id5000/sites/lille/environments/squeeze-x64-nfs-1.10.json

...rid5000/sites/lille/environments/squeeze-x64-xen-1.8.json

...0/sites/luxembourg/environments/squeeze-x64-base-1.8.json

...0/sites/luxembourg/environments/squeeze-x64-big-1.10.json

...0/sites/luxembourg/environments/squeeze-x64-min-1.10.json

...0/sites/luxembourg/environments/squeeze-x64-nfs-1.10.json

...00/sites/luxembourg/environments/squeeze-x64-xen-1.8.json