fix clustercache break

Author: mogliang

controllers/clustercache/cluster_accessor_test.go

@@ -278,6 +278,7 @@ func TestHealthCheck(t *testing.T) {
 				},
 			})
 			accessor.lockedState.connection = &clusterAccessorLockedConnectionState{
+				restConfig: env.Config,
 				restClient: &fake.RESTClient{
 					NegotiatedSerializer: scheme.Codecs,
 					Resp:                 tt.restClientHTTPResponse,