bump(*): kubernetes release-1.16.0 dependencies

vendor/github.com/docker/distribution/context/trace_test.go

@@ -1,6 +1,7 @@
 package context
 
 import (
+	"context"
 	"runtime"
 	"testing"
 	"time"
@@ -35,7 +36,7 @@ func TestWithTrace(t *testing.T) {
 	ctx, done := WithTrace(Background())
 	defer done("this will be emitted at end of test")
 
-	checkContextForValues(t, ctx, append(base, valueTestCase{
+	checkContextForValues(ctx, t, append(base, valueTestCase{
 		key:      "trace.func",
 		expected: f.Name(),
 	}))
@@ -48,7 +49,7 @@ func TestWithTrace(t *testing.T) {
 		ctx, done := WithTrace(ctx)
 		defer done("this should be subordinate to the other trace")
 		time.Sleep(time.Second)
-		checkContextForValues(t, ctx, append(base, valueTestCase{
+		checkContextForValues(ctx, t, append(base, valueTestCase{
 			key:      "trace.func",
 			expected: f.Name(),
 		}, valueTestCase{
@@ -67,8 +68,7 @@ type valueTestCase struct {
 	notnilorempty bool // just check not empty/not nil
 }
 
-func checkContextForValues(t *testing.T, ctx Context, values []valueTestCase) {
-
+func checkContextForValues(ctx context.Context, t *testing.T, values []valueTestCase) {
 	for _, testcase := range values {
 		v := ctx.Value(testcase.key)
 		if testcase.notnilorempty {