Move setting /sys/* options to an external utility

This allows us to have a cron job that will run on reboot, to make these
settings persistent accross reboots.
Merge pull request #194 from vuntz/set-sys-options

Move setting /sys/* options to an external utility
Search for Glance-server in the right environment
Merge pull request #196 from dirkmueller/glance_search

Search for Glance-server in the right environment