pmem-csi-driver test: enable klog/v2

To see log output, we must initialize the arguments and run the test
with -v=5.

Author: pohly

pkg/pmem-csi-driver/pmem-csi-driver_test.go

@@ -15,6 +15,8 @@ import (
 	"os"
 	"testing"
 
+	"k8s.io/klog/v2"
+
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
@@ -25,6 +27,10 @@ var (
 	keyFile  = os.ExpandEnv("${TEST_WORK}/pmem-ca/pmem-registry-key.pem")
 )
 
+func init() {
+	klog.InitFlags(nil)
+}
+
 func TestMetrics(t *testing.T) {
 	cases := map[string]struct {
 		path     string