Config routing for openshift origin

config-route-openshift-origin

1. configure `router-id` in `/etc/origin/cloudprovider/openstack.conf`

cat << EOF >> /etc/origin/cloudprovider/openstack.conf
[Route]
router-id = <router-id>
EOF

2. Adding following config options under `controllerArguments:` of `/etc/origin/master/master-config.yaml`
```
    allocate-node-cidrs:
    - "true"
    configure-cloud-routes:
    - "true"
    cluster-cidr:
    - "172.17.0.0/16"
```

3. set all the `networkPluginName` to ""

ERROR:

Dec 25 11:25:07 master-0 origin-master-controllers: W1225 11:25:07.371045   65669 openstack.go:635] Failed to list neutron extensions: Resource not found
Dec 25 11:25:07 master-0 origin-master-controllers: W1225 11:25:07.371067   65669 core.go:141] configure-cloud-routes is set, but cloud provider does not support routes. Will not configure cloud provider routes.