make e2e test compatible with go1.13

internal/test/e2e/main_test.go

@@ -23,6 +23,12 @@ var (
 	nodeName   string
 )
 
+// go1.13 compatibility cf. https://github.com/golang/go/issues/31859
+var _ = func() bool {
+	testing.Init()
+	return true
+}()
+
 func init() {
 	flag.StringVar(&kubeconfig, "kubeconfig", "", "path to the kubeconfig file to use when running the test suite outside a kubernetes cluster")
 	flag.StringVar(&namespace, "namespace", defaultNamespace, "the name of the kubernetes namespace to use for running the test suite (i.e. where to create pods)")