Update dependencies to K8s 1.8

vendor/k8s.io/client-go/rest/config.go

@@ -71,6 +71,10 @@ type Config struct {
 	// TODO: demonstrate an OAuth2 compatible client.
 	BearerToken string
 
+	// CacheDir is the directory where we'll store HTTP cached responses.
+	// If set to empty string, no caching mechanism will be used.
+	CacheDir string
+
 	// Impersonate is the configuration that RESTClient will use for impersonation.
 	Impersonate ImpersonationConfig
 
@@ -110,6 +114,9 @@ type Config struct {
 	// The maximum length of time to wait before giving up on a server request. A value of zero means no timeout.
 	Timeout time.Duration
 
+	// Dial specifies the dial function for creating unencrypted TCP connections.
+	Dial func(network, addr string) (net.Conn, error)
+
 	// Version forces a specific version to be used (if registered)
 	// Do we need this?
 	// Version string