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*,