Use prefixed system user
(cherry picked from commit 170286dd7e2c362e2af4436646a8348f61f6aced)

Signed-off-by: Ralf Haferkamp <rhafer@suse.de>

Conflicts:
	chef/cookbooks/nova/recipes/config.rb
add xen deployment support
(cherry picked from commit 6fa5b5e6c1d222001b7e75fed4ad5d350dd3b900)

Signed-off-by: Ralf Haferkamp <rhafer@suse.de>

Conflicts:
	chef/cookbooks/nova/recipes/compute.rb
	chef/cookbooks/nova/templates/default/nova.conf.erb
Merge pull request #2 from rhafer/release/pebbles/pending

Next chunk of essex-hack-suse work