update kube and vendor dependencies

With kubernetes 1.18 release of client-go, signatures on methods in
generated clientsets, dynamic, metadata, and scale clients have been
modified to accept context.Context as a first argument.
Signatures of Create, Update, and Patch methods have been updated
to accept CreateOptions, UpdateOptions and PatchOptions respectively.
Signatures of Delete and DeleteCollection methods now accept
DeleteOptions by value instead of by reference.
These changes are now accommodated with this PR and client-go
and dependencies are updated to v1.18.0

Signed-off-by: Humble Chirammal <hchiramm@redhat.com>

vendor/k8s.io/client-go/tools/leaderelection/resourcelock/multilock.go

@@ -18,6 +18,7 @@ package resourcelock
 
 import (
 	"bytes"
+	"context"
 	"encoding/json"
 
 	apierrors "k8s.io/apimachinery/pkg/api/errors"
@@ -34,13 +35,13 @@ type MultiLock struct {
 }
 
 // Get returns the older election record of the lock
-func (ml *MultiLock) Get() (*LeaderElectionRecord, []byte, error) {
-	primary, primaryRaw, err := ml.Primary.Get()
+func (ml *MultiLock) Get(ctx context.Context) (*LeaderElectionRecord, []byte, error) {
+	primary, primaryRaw, err := ml.Primary.Get(ctx)
 	if err != nil {
 		return nil, nil, err
 	}
 
-	secondary, secondaryRaw, err := ml.Secondary.Get()
+	secondary, secondaryRaw, err := ml.Secondary.Get(ctx)
 	if err != nil {
 		// Lock is held by old client
 		if apierrors.IsNotFound(err) && primary.HolderIdentity != ml.Identity() {
@@ -60,25 +61,25 @@ func (ml *MultiLock) Get() (*LeaderElectionRecord, []byte, error) {
 }
 
 // Create attempts to create both primary lock and secondary lock
-func (ml *MultiLock) Create(ler LeaderElectionRecord) error {
-	err := ml.Primary.Create(ler)
+func (ml *MultiLock) Create(ctx context.Context, ler LeaderElectionRecord) error {
+	err := ml.Primary.Create(ctx, ler)
 	if err != nil && !apierrors.IsAlreadyExists(err) {
 		return err
 	}
-	return ml.Secondary.Create(ler)
+	return ml.Secondary.Create(ctx, ler)
 }
 
 // Update will update and existing annotation on both two resources.
-func (ml *MultiLock) Update(ler LeaderElectionRecord) error {
-	err := ml.Primary.Update(ler)
+func (ml *MultiLock) Update(ctx context.Context, ler LeaderElectionRecord) error {
+	err := ml.Primary.Update(ctx, ler)
 	if err != nil {
 		return err
 	}
-	_, _, err = ml.Secondary.Get()
+	_, _, err = ml.Secondary.Get(ctx)
 	if err != nil && apierrors.IsNotFound(err) {
-		return ml.Secondary.Create(ler)
+		return ml.Secondary.Create(ctx, ler)
 	}
-	return ml.Secondary.Update(ler)
+	return ml.Secondary.Update(ctx, ler)
 }
 
 // RecordEvent in leader election while adding meta-data