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/github.com/google/gofuzz/fuzz.go

@@ -20,6 +20,7 @@ import (
 	"fmt"
 	"math/rand"
 	"reflect"
+	"regexp"
 	"time"
 )
 
@@ -28,13 +29,14 @@ type fuzzFuncMap map[reflect.Type]reflect.Value
 
 // Fuzzer knows how to fill any object with random fields.
 type Fuzzer struct {
-	fuzzFuncs        fuzzFuncMap
-	defaultFuzzFuncs fuzzFuncMap
-	r                *rand.Rand
-	nilChance        float64
-	minElements      int
-	maxElements      int
-	maxDepth         int
+	fuzzFuncs         fuzzFuncMap
+	defaultFuzzFuncs  fuzzFuncMap
+	r                 *rand.Rand
+	nilChance         float64
+	minElements       int
+	maxElements       int
+	maxDepth          int
+	skipFieldPatterns []*regexp.Regexp
 }
 
 // New returns a new Fuzzer. Customize your Fuzzer further by calling Funcs,
@@ -150,6 +152,13 @@ func (f *Fuzzer) MaxDepth(d int) *Fuzzer {
 	return f
 }
 
+// Skip fields which match the supplied pattern. Call this multiple times if needed
+// This is useful to skip XXX_ fields generated by protobuf
+func (f *Fuzzer) SkipFieldsWithPattern(pattern *regexp.Regexp) *Fuzzer {
+	f.skipFieldPatterns = append(f.skipFieldPatterns, pattern)
+	return f
+}
+
 // Fuzz recursively fills all of obj's fields with something random.  First
 // this tries to find a custom fuzz function (see Funcs).  If there is no
 // custom function this tests whether the object implements fuzz.Interface and,
@@ -274,7 +283,17 @@ func (fc *fuzzerContext) doFuzz(v reflect.Value, flags uint64) {
 		v.Set(reflect.Zero(v.Type()))
 	case reflect.Struct:
 		for i := 0; i < v.NumField(); i++ {
-			fc.doFuzz(v.Field(i), 0)
+			skipField := false
+			fieldName := v.Type().Field(i).Name
+			for _, pattern := range fc.fuzzer.skipFieldPatterns {
+				if pattern.MatchString(fieldName) {
+					skipField = true
+					break
+				}
+			}
+			if !skipField {
+				fc.doFuzz(v.Field(i), 0)
+			}
 		}
 	case reflect.Chan:
 		fallthrough