Make each integration test use different prefix

test/integration/framework/master_utils.go

@@ -49,9 +49,10 @@ import (
 	kubeletclient "k8s.io/kubernetes/pkg/kubelet/client"
 	"k8s.io/kubernetes/pkg/master"
 	"k8s.io/kubernetes/pkg/runtime"
-	"k8s.io/kubernetes/pkg/storage/etcd/etcdtest"
 	"k8s.io/kubernetes/pkg/storage/storagebackend"
 	"k8s.io/kubernetes/plugin/pkg/admission/admit"
+
+	"github.com/pborman/uuid"
 )
 
 const (
@@ -154,7 +155,10 @@ func startMasterOrDie(masterConfig *master.Config) (*master.Master, *httptest.Se
 func NewMasterConfig() *master.Config {
 	config := storagebackend.Config{
 		ServerList: []string{"http://127.0.0.1:4001"},
-		Prefix:     etcdtest.PathPrefix(),
+		// TODO: this is a quick hack to work around #27179. It
+		// conveniently exercises the prefix code, so maybe it's worth
+		// leaving in.
+		Prefix: uuid.New(),
 	}
 
 	negotiatedSerializer := NewSingleContentTypeSerializer(api.Scheme, testapi.Default.Codec(), runtime.ContentTypeJSON)