Update Puppet refs for Neutron & Cinder modules

- Neutron: fix a bug in Debian where /etc/default/neutron-server was not
  existing. A puppet patch fix this.
- Cinder: improve scalability of services with multiple workers computed
  by processor number fact.
Merge pull request #631 from enovance/puppet-refs

Update Puppet refs for Neutron & Cinder modules