Port to SUSE

Use correct user, service, package names.

Also stop making the user configurable: this should not be the case.
Disable verbose/debug by default
Do not create proposal if no instance found for barclamp dependencies
Correctly configure tgtd to include cinder config files on SUSE

The default /etc/tgt/targets.conf is empty on SUSE.
Do not use platform?("suse")

Apparently, it doesn't work as expected :/
Merge pull request #27 from vuntz/initial-suse-port

Initial SUSE port