Vendor: Update k8s version

Signed-off-by: Michał Żyłowski <michal.zylowski@intel.com>

vendor/k8s.io/kubernetes/federation/pkg/dnsprovider/providers/coredns/rrchangeset.go

@@ -19,10 +19,11 @@ package coredns
 import (
 	"encoding/json"
 	"fmt"
+	"hash/fnv"
+
 	etcdc "github.com/coreos/etcd/client"
 	dnsmsg "github.com/miekg/coredns/middleware/etcd/msg"
 	"golang.org/x/net/context"
-	"hash/fnv"
 	"k8s.io/kubernetes/federation/pkg/dnsprovider"
 )
 

vendor/k8s.io/kubernetes/federation/pkg/dnsprovider/providers/coredns/stubs/corednsapi.go

@@ -18,9 +18,10 @@ limitations under the License.
 package stubs
 
 import (
+	"strings"
+
 	etcd "github.com/coreos/etcd/client"
 	"golang.org/x/net/context"
-	"strings"
 )
 
 // Compile time check for interface conformance