update vendor to latest kubernetes 1.14.0

some of the kubernetes independent
packages are moved out of the tree to
new projects.

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

vendor/k8s.io/client-go/transport/transport.go

@@ -17,6 +17,7 @@ limitations under the License.
 package transport
 
 import (
+	"context"
 	"crypto/tls"
 	"crypto/x509"
 	"fmt"
@@ -167,3 +168,60 @@ func rootCertPool(caData []byte) *x509.CertPool {
 	certPool.AppendCertsFromPEM(caData)
 	return certPool
 }
+
+// WrapperFunc wraps an http.RoundTripper when a new transport
+// is created for a client, allowing per connection behavior
+// to be injected.
+type WrapperFunc func(rt http.RoundTripper) http.RoundTripper
+
+// Wrappers accepts any number of wrappers and returns a wrapper
+// function that is the equivalent of calling each of them in order. Nil
+// values are ignored, which makes this function convenient for incrementally
+// wrapping a function.
+func Wrappers(fns ...WrapperFunc) WrapperFunc {
+	if len(fns) == 0 {
+		return nil
+	}
+	// optimize the common case of wrapping a possibly nil transport wrapper
+	// with an additional wrapper
+	if len(fns) == 2 && fns[0] == nil {
+		return fns[1]
+	}
+	return func(rt http.RoundTripper) http.RoundTripper {
+		base := rt
+		for _, fn := range fns {
+			if fn != nil {
+				base = fn(base)
+			}
+		}
+		return base
+	}
+}
+
+// ContextCanceller prevents new requests after the provided context is finished.
+// err is returned when the context is closed, allowing the caller to provide a context
+// appropriate error.
+func ContextCanceller(ctx context.Context, err error) WrapperFunc {
+	return func(rt http.RoundTripper) http.RoundTripper {
+		return &contextCanceller{
+			ctx: ctx,
+			rt:  rt,
+			err: err,
+		}
+	}
+}
+
+type contextCanceller struct {
+	ctx context.Context
+	rt  http.RoundTripper
+	err error
+}
+
+func (b *contextCanceller) RoundTrip(req *http.Request) (*http.Response, error) {
+	select {
+	case <-b.ctx.Done():
+		return nil, b.err
+	default:
+		return b.rt.RoundTrip(req)
+	}
+}