20180115 / General reboot TODAY

Beginning at 14:30 today :

• A security upgrade will be installed, on each server, with a reboot,
• E5 and x55 /scratch will be destroy (data loss) and restart from zero,

EDIT:20180115@17:05

• reboot is OK, except visualisation servers and some nodes,
• all /scratch OK,
• all fileservers OK,
• all services OK,
• compute nodes almost OK,