Bump cAdvisor (and dependencies) godeps version

vendor/github.com/google/cadvisor/container/rkt/client.go

@@ -20,6 +20,7 @@ import (
 	"sync"
 	"time"
 
+	"github.com/blang/semver"
 	rktapi "github.com/coreos/rkt/api/v1alpha"
 
 	"golang.org/x/net/context"
@@ -29,6 +30,7 @@ import (
 const (
 	defaultRktAPIServiceAddr = "localhost:15441"
 	timeout                  = 2 * time.Second
+	minimumRktBinVersion     = "1.6.0"
 )
 
 var (
@@ -55,7 +57,25 @@ func Client() (rktapi.PublicAPIClient, error) {
 			return
 		}
 
-		rktClient = rktapi.NewPublicAPIClient(apisvcConn)
+		apisvc := rktapi.NewPublicAPIClient(apisvcConn)
+
+		resp, err := apisvc.GetInfo(context.Background(), &rktapi.GetInfoRequest{})
+		if err != nil {
+			rktClientErr = fmt.Errorf("rkt: GetInfo() failed: %v", err)
+			return
+		}
+
+		binVersion, err := semver.Make(resp.Info.RktVersion)
+		if err != nil {
+			rktClientErr = fmt.Errorf("rkt: couldn't parse RtVersion: %v", err)
+			return
+		}
+		if binVersion.LT(semver.MustParse(minimumRktBinVersion)) {
+			rktClientErr = fmt.Errorf("rkt: binary version is too old(%v), requires at least %v", resp.Info.RktVersion, minimumRktBinVersion)
+			return
+		}
+
+		rktClient = apisvc
 	})
 
 	return rktClient, rktClientErr