Update to kube v1.17

Signed-off-by: Humble Chirammal <hchiramm@redhat.com>

vendor/k8s.io/apiserver/pkg/util/webhook/serviceresolver.go

@@ -0,0 +1,47 @@
+/*
+Copyright 2017 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 webhook
+
+import (
+	"errors"
+	"fmt"
+	"net/url"
+)
+
+// ServiceResolver knows how to convert a service reference into an actual location.
+type ServiceResolver interface {
+	ResolveEndpoint(namespace, name string, port int32) (*url.URL, error)
+}
+
+type defaultServiceResolver struct{}
+
+// NewDefaultServiceResolver creates a new default server resolver.
+func NewDefaultServiceResolver() ServiceResolver {
+	return &defaultServiceResolver{}
+}
+
+// ResolveEndpoint constructs a service URL from a given namespace and name
+// note that the name, namespace, and port are required and by default all
+// created addresses use HTTPS scheme.
+// for example:
+//  name=ross namespace=andromeda resolves to https://ross.andromeda.svc:443
+func (sr defaultServiceResolver) ResolveEndpoint(namespace, name string, port int32) (*url.URL, error) {
+	if len(name) == 0 || len(namespace) == 0 || port == 0 {
+		return nil, errors.New("cannot resolve an empty service name or namespace or port")
+	}
+	return &url.URL{Scheme: "https", Host: fmt.Sprintf("%s.%s.svc:%d", name, namespace, port)}, nil
+}