Update kubernetes to v1.11.0-beta.2

Signed-off-by: Lantao Liu <lantaol@google.com>

vendor.conf

@@ -49,7 +49,6 @@ github.com/prometheus/common 89604d197083d4781071d3c65855d24ecfb0a563
 github.com/prometheus/procfs cb4147076ac75738c9a7d279075a253c0cc5acbd
 github.com/seccomp/libseccomp-golang 32f571b70023028bd57d9288c20efbcb237f3ce0
 github.com/sirupsen/logrus v1.0.0
-github.com/spf13/pflag v1.0.0
 github.com/stevvooe/ttrpc d4528379866b0ce7e9d71f3eb96f0582fc374577
 github.com/stretchr/testify v1.1.4
 github.com/syndtr/gocapability db04d3cc01c8b54962a58ec7e491717d06cfcc16
@@ -65,9 +64,9 @@ google.golang.org/genproto d80a6e20e776b0b17a324d0ba1ab50a39c8e8944
 google.golang.org/grpc v1.12.0
 gopkg.in/inf.v0 3887ee99ecf07df5b447e9b00d9c0b2adaa9f3e4
 gopkg.in/yaml.v2 53feefa2559fb8dfa8d81baad31be332c97d6c77
-k8s.io/api 7e796de92438aede7cb5d6bcf6c10f4fa65db560
-k8s.io/apimachinery fcb9a12f7875d01f8390b28faedc37dcf2e713b9
-k8s.io/apiserver 4a8377c547bbff4576a35b5b5bf4026d9b5aa763
-k8s.io/client-go b9a0cf870f239c4a4ecfd3feb075a50e7cbe1473
-k8s.io/kubernetes v1.10.0
+k8s.io/api aac5d23ea3ca7132d75daeed7516f8205553c832
+k8s.io/apimachinery 521145febf93d5639dce48a49ee8dc080863b034
+k8s.io/apiserver 0553b9748924ffb5737340cb0afa6f0de2b12c42
+k8s.io/client-go 6fd8d2ef33ca9a0d821c9d66c23793cc8603d897
+k8s.io/kubernetes v1.11.0-beta.2
 k8s.io/utils 258e2a2fa64568210fbd6267cf1d8fd87c3cb86e