Fix race in lifecycle admission test

.State.Phase is read and written by multiple goroutines as reported by `godep
go test -race` on Go 1.5.1. Adding the mutex around the object fixes the
issue.

plugin/pkg/admission/namespace/lifecycle/admission_test.go

@@ -18,6 +18,7 @@ package lifecycle
 
 import (
 	"fmt"
+	"sync"
 	"testing"
 
 	"k8s.io/kubernetes/pkg/admission"
@@ -39,6 +40,7 @@ func TestAdmission(t *testing.T) {
 			Phase: api.NamespaceActive,
 		},
 	}
+	var namespaceLock sync.RWMutex
 
 	store := cache.NewStore(cache.MetaNamespaceKeyFunc)
 	store.Add(namespaceObj)
@@ -46,12 +48,16 @@ func TestAdmission(t *testing.T) {
 	mockClient := &testclient.Fake{}
 	mockClient.AddWatchReactor("*", testclient.DefaultWatchReactor(fakeWatch, nil))
 	mockClient.AddReactor("get", "namespaces", func(action testclient.Action) (bool, runtime.Object, error) {
+		namespaceLock.RLock()
+		defer namespaceLock.RUnlock()
 		if getAction, ok := action.(testclient.GetAction); ok && getAction.GetName() == namespaceObj.Name {
 			return true, namespaceObj, nil
 		}
 		return true, nil, fmt.Errorf("No result for action %v", action)
 	})
 	mockClient.AddReactor("list", "namespaces", func(action testclient.Action) (bool, runtime.Object, error) {
+		namespaceLock.RLock()
+		defer namespaceLock.RUnlock()
 		return true, &api.NamespaceList{Items: []api.Namespace{*namespaceObj}}, nil
 	})
 
@@ -78,7 +84,9 @@ func TestAdmission(t *testing.T) {
 	}
 
 	// change namespace state to terminating
+	namespaceLock.Lock()
 	namespaceObj.Status.Phase = api.NamespaceTerminating
+	namespaceLock.Unlock()
 	store.Add(namespaceObj)
 
 	// verify create operations in the namespace cause an error