Merge pull request #53944 from gregory-m/sample-controller-tests

Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Sample controller tests

**What this PR does / why we need it**:
This PR adds unit tests to sample-controller.

**Special notes for your reviewer**:
This is currently based on the munnerz:sample-controller branch. Please don't merged it until #52753 is merged.

Kubernetes-commit: dc20badcd49e5fd2ab41d4320c9c70a50d30343c

vendor/k8s.io/client-go/rest/config.go

@@ -17,6 +17,7 @@ limitations under the License.
 package rest
 
 import (
+	"context"
 	"fmt"
 	"io/ioutil"
 	"net"
@@ -110,7 +111,7 @@ type Config struct {
 	Timeout time.Duration
 
 	// Dial specifies the dial function for creating unencrypted TCP connections.
-	Dial func(network, addr string) (net.Conn, error)
+	Dial func(ctx context.Context, network, address string) (net.Conn, error)
 
 	// Version forces a specific version to be used (if registered)
 	// Do we need this?