bump to v1.15.0 (#2965)

* bump to v1.15.0
* more linter hints
* update dependencies of kubectl-pg plugin

kubectl-pg/cmd/connect.go

@@ -23,6 +23,7 @@ THE SOFTWARE.
 package cmd
 
 import (
+	"context"
 	"log"
 	"os"
 	user "os/user"
@@ -121,7 +122,7 @@ func connect(clusterName string, master bool, replica string, psql bool, user st
 		log.Fatal(err)
 	}
 
-	err = exec.Stream(remotecommand.StreamOptions{
+	err = exec.StreamWithContext(context.TODO(), remotecommand.StreamOptions{
 		Stdin:  os.Stdin,
 		Stdout: os.Stdout,
 		Stderr: os.Stderr,

kubectl-pg/cmd/version.go

@@ -65,7 +65,7 @@ func version(namespace string) {
 
 	operatorDeployment := getPostgresOperator(client)
 	if operatorDeployment.Name == "" {
-		log.Fatal("make sure zalando's postgres operator is running")
+		log.Fatalf("make sure zalando's postgres operator is running in namespace %s", namespace)
 	}
 	operatorImage := operatorDeployment.Spec.Template.Spec.Containers[0].Image
 	imageDetails := strings.Split(operatorImage, ":")