Adjust default swift-proxy port to OpenStack default 8080

* Adjust proxy-server to use port 8080 by default
* Adjust haproxy plays to use the appropriate port for swift-proxy
* Move kibana haproxy port from 8080 to 8888
* Adjust MaaS plays to use port 8080 for swift-proxy monitoring

Fixes #609
Merge pull request #623 from andymcc/swift_proxy_port

Adjust default swift-proxy port to OpenStack default 8080