Work towards resolving DE238
Define quantum-server only when needed

Only define the quantum-server HA service if
node["nova"]["network"]["provider"] is "quantum".
Merge pull request #54 from DavidWittman/quantum-attribute

Merged automatically by jenkins after successful build test
finish code for DE238
fix merge conflict
Merge pull request #55 from rackerjoe/DE238

Merged automatically by jenkins after successful build test