Get cluster config from configmap when managing service with paictl.

[ydye]

• Broken Change
  • paictl service will remove the parameter -p /path/to/cluster/configuration/dir. And add the new parameter -c /path/to/kubeconfig to pass the path of kubeconfig.
  • paictl service will get cluster configuration from kubernetes. Depends on the feature of configuration storage, admin could use the command paictl config to manage the cluster configuration, such as push, pull and generate.
  • configuration storage feature is forced enable after this change. So if you do not store your configuration into your kubernetes cluster, please push your configuration into the cluster first.

[coveralls]

Coverage increased (+0.01%) to 51.632% when pulling 0b6d318 on yuye/paictl-service-change into b7df7bd on master.