vendor update for E2E framework

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

vendor/k8s.io/kubernetes/pkg/util/system/system_utils.go

@@ -0,0 +1,36 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package system
+
+import (
+	"strings"
+)
+
+// TODO: find a better way of figuring out if given node is a registered master.
+func IsMasterNode(nodeName string) bool {
+	// We are trying to capture "master(-...)?$" regexp.
+	// However, using regexp.MatchString() results even in more than 35%
+	// of all space allocations in ControllerManager spent in this function.
+	// That's why we are trying to be a bit smarter.
+	if strings.HasSuffix(nodeName, "master") {
+		return true
+	}
+	if len(nodeName) >= 10 {
+		return strings.HasSuffix(nodeName[:len(nodeName)-3], "master-")
+	}
+	return false
+}