Merge pull request #12 from vuntz/setcreds-typo

Fix typo that was breaking the "nova secgroup-*" calls at the end
Run *-manage tools as the respective user for each service

We use a small run_as helper function to make this easier.

This helps fix some issues where these calls were creating log files
belonging to root.
Do not run mysql in cleanup if the binary is not there
configure tgt for cinder
Fix name of novncproxy init script

It's openstack-nova-novncproxy now, not openstack-novncproxy.
open-iscsi init script got renamed to iscsid

We also keep the open-iscsi name for SLE support: the code checks if the
init script exists, so it doesn't hurt to keep support for the old name.
Also start openstack-nova-console service