Merge pull request #577 from sxllwx/k8s_enhance

registry/kubernetes/listener.go

registry/kubernetes/listener_test.go

registry/kubernetes/registry.go

registry/kubernetes/registry_test.go

remoting/kubernetes/client.go

remoting/kubernetes/client_test.go

remoting/kubernetes/facade.go

remoting/kubernetes/facade_test.go

remoting/kubernetes/listener.go

remoting/kubernetes/listener_test.go

remoting/kubernetes/registry_controller.go

remoting/kubernetes/watch.go

remoting/listener.go

remoting/zookeeper/client_test.go

test/integrate/dubbo/go-client/go.sum