rebase: update kubernetes to v1.20.0

updated kubernetes packages to latest
release.

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

vendor/k8s.io/client-go/restmapper/category_expansion.go

@@ -58,7 +58,7 @@ func NewDiscoveryCategoryExpander(client discovery.DiscoveryInterface) CategoryE
 // Expand fulfills CategoryExpander
 func (e discoveryCategoryExpander) Expand(category string) ([]schema.GroupResource, bool) {
 	// Get all supported resources for groups and versions from server, if no resource found, fallback anyway.
-	apiResourceLists, _ := e.discoveryClient.ServerResources()
+	_, apiResourceLists, _ := e.discoveryClient.ServerGroupsAndResources()
 	if len(apiResourceLists) == 0 {
 		return nil, false
 	}

vendor/k8s.io/client-go/restmapper/discovery.go

@@ -26,7 +26,7 @@ import (
 	"k8s.io/apimachinery/pkg/runtime/schema"
 	"k8s.io/client-go/discovery"
 
-	"k8s.io/klog"
+	"k8s.io/klog/v2"
 )
 
 // APIGroupResources is an API group with a mapping of versions to

vendor/k8s.io/client-go/restmapper/shortcut.go

@@ -19,7 +19,7 @@ package restmapper
 import (
 	"strings"
 
-	"k8s.io/klog"
+	"k8s.io/klog/v2"
 
 	"k8s.io/apimachinery/pkg/api/meta"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
@@ -84,7 +84,7 @@ func (e shortcutExpander) getShortcutMappings() ([]*metav1.APIResourceList, []re
 	res := []resourceShortcuts{}
 	// get server resources
 	// This can return an error *and* the results it was able to find.  We don't need to fail on the error.
-	apiResList, err := e.discoveryClient.ServerResources()
+	_, apiResList, err := e.discoveryClient.ServerGroupsAndResources()
 	if err != nil {
 		klog.V(1).Infof("Error loading discovery information: %v", err)
 	}