* debian/quantum-server.{default, upstart}: Use default file to specify
path to plugin config, which is passed to quantum-server as
'--config-file' during startup. (LP: #1009294)
* debian/control:
- Remove quantum-server's dependency on 'quantum-plugin'.
- Specify >= 1:0.1.0.1-0ubuntu1 requirement for python-quantumclient.