bump k8s releated library (#3552)

Signed-off-by: zouyee <zounengren@cmss.chinamobile.com>

go.mod

 module github.com/coredns/coredns
 
-go 1.12
+go 1.13
 
 require (
 	cloud.google.com/go v0.41.0 // indirect
@@ -16,7 +16,6 @@ require (
 	github.com/coreos/go-systemd v0.0.0-20190212144455-93d5ec2c7f76 // indirect
 	github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f // indirect
 	github.com/dnstap/golang-dnstap v0.0.0-20170829151710-2cf77a2b5e11
-	github.com/evanphx/json-patch v4.1.0+incompatible // indirect
 	github.com/farsightsec/golang-framestream v0.0.0-20181102145529-8a0cb8ba8710
 	github.com/golang/groupcache v0.0.0-20190129154638-5b532d6fd5ef // indirect
 	github.com/golang/protobuf v1.3.2
@@ -33,7 +32,6 @@ require (
 	github.com/prometheus/client_golang v1.2.1
 	github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4
 	github.com/prometheus/common v0.7.0
-	github.com/spf13/pflag v1.0.3 // indirect
 	github.com/tinylib/msgp v1.1.0 // indirect
 	github.com/tmc/grpc-websocket-proxy v0.0.0-20190109142713-0ad062ec5ee5 // indirect
 	go.etcd.io/etcd v0.5.0-alpha.5.0.20190917205325-a14579fbfb1a
@@ -43,13 +41,10 @@ require (
 	google.golang.org/api v0.14.0
 	google.golang.org/grpc v1.25.1
 	gopkg.in/DataDog/dd-trace-go.v1 v1.19.0
-	gopkg.in/inf.v0 v0.9.1 // indirect
-	k8s.io/api v0.0.0-20190620084959-7cf5895f2711
-	k8s.io/apimachinery v0.0.0-20190612205821-1799e75a0719
-	k8s.io/client-go v0.0.0-20190620085101-78d2af792bab
-	k8s.io/klog v0.4.0
-	k8s.io/kube-openapi v0.0.0-20190306001800-15615b16d372 // indirect
-	k8s.io/utils v0.0.0-20190529001817-6999998975a7 // indirect
+	k8s.io/api v0.17.0
+	k8s.io/apimachinery v0.17.0
+	k8s.io/client-go v0.17.0
+	k8s.io/klog v1.0.0
 )
 
 replace (

plugin/kubernetes/object/object.go

@@ -88,12 +88,6 @@ func (e *Empty) GetAnnotations() map[string]string { return nil }
 // SetAnnotations implements the metav1.Object interface.
 func (e *Empty) SetAnnotations(annotations map[string]string) {}
 
-// GetInitializers implements the metav1.Object interface.
-func (e *Empty) GetInitializers() *v1.Initializers { return nil }
-
-// SetInitializers implements the metav1.Object interface.
-func (e *Empty) SetInitializers(initializers *v1.Initializers) {}
-
 // GetFinalizers implements the metav1.Object interface.
 func (e *Empty) GetFinalizers() []string { return nil }