rebase: update kubernetes to v1.20.0

updated kubernetes packages to latest
release.

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

vendor/k8s.io/utils/pointer/README.md

@@ -0,0 +1,3 @@
+# Pointer
+
+This package provides some functions for pointer-based operations.

vendor/k8s.io/utils/pointer/pointer.go

@@ -51,14 +51,23 @@ func Int32Ptr(i int32) *int32 {
 	return &i
 }
 
+// Int32PtrDerefOr dereference the int32 ptr and returns it if not nil,
+// else returns def.
+func Int32PtrDerefOr(ptr *int32, def int32) int32 {
+	if ptr != nil {
+		return *ptr
+	}
+	return def
+}
+
 // Int64Ptr returns a pointer to an int64
 func Int64Ptr(i int64) *int64 {
 	return &i
 }
 
-// Int32PtrDerefOr dereference the int32 ptr and returns it if not nil,
+// Int64PtrDerefOr dereference the int64 ptr and returns it if not nil,
 // else returns def.
-func Int32PtrDerefOr(ptr *int32, def int32) int32 {
+func Int64PtrDerefOr(ptr *int64, def int64) int64 {
 	if ptr != nil {
 		return *ptr
 	}
@@ -70,17 +79,53 @@ func BoolPtr(b bool) *bool {
 	return &b
 }
 
+// BoolPtrDerefOr dereference the bool ptr and returns it if not nil,
+// else returns def.
+func BoolPtrDerefOr(ptr *bool, def bool) bool {
+	if ptr != nil {
+		return *ptr
+	}
+	return def
+}
+
 // StringPtr returns a pointer to the passed string.
 func StringPtr(s string) *string {
 	return &s
 }
 
+// StringPtrDerefOr dereference the string ptr and returns it if not nil,
+// else returns def.
+func StringPtrDerefOr(ptr *string, def string) string {
+	if ptr != nil {
+		return *ptr
+	}
+	return def
+}
+
 // Float32Ptr returns a pointer to the passed float32.
 func Float32Ptr(i float32) *float32 {
 	return &i
 }
 
+// Float32PtrDerefOr dereference the float32 ptr and returns it if not nil,
+// else returns def.
+func Float32PtrDerefOr(ptr *float32, def float32) float32 {
+	if ptr != nil {
+		return *ptr
+	}
+	return def
+}
+
 // Float64Ptr returns a pointer to the passed float64.
 func Float64Ptr(i float64) *float64 {
 	return &i
 }
+
+// Float64PtrDerefOr dereference the float64 ptr and returns it if not nil,
+// else returns def.
+func Float64PtrDerefOr(ptr *float64, def float64) float64 {
+	if ptr != nil {
+		return *ptr
+	}
+	return def
+}