Adjust nginx lb timeout in tests

In addition delete the service & lb before ending to test to avoid the case
when deleting the namespace times out due to long LB deletion.

Ref.  kubernetes#82695

test/e2e/framework/ingress/ingress_utils.go

@@ -831,6 +831,7 @@ type NginxIngressController struct {
 	rc     *v1.ReplicationController
 	pod    *v1.Pod
 	Client clientset.Interface
+	lbSvc  *v1.Service
 }
 
 // Init initializes the NginxIngressController
@@ -848,8 +849,8 @@ func (cont *NginxIngressController) Init() {
 			{Name: "https", Port: 443},
 			{Name: "stats", Port: 18080}}
 	})
-	svc := serviceJig.WaitForLoadBalancerOrFail(cont.Ns, "nginx-ingress-lb", e2eservice.LoadBalancerCreateTimeoutDefault)
-	serviceJig.SanityCheckService(svc, v1.ServiceTypeLoadBalancer)
+	cont.lbSvc = serviceJig.WaitForLoadBalancerOrFail(cont.Ns, "nginx-ingress-lb", e2eservice.GetServiceLoadBalancerCreationTimeout(cont.Client))
+	serviceJig.SanityCheckService(cont.lbSvc, v1.ServiceTypeLoadBalancer)
 
 	read := func(file string) string {
 		return string(testfiles.ReadOrDie(filepath.Join(IngressManifestPath, "nginx", file)))
@@ -873,6 +874,15 @@ func (cont *NginxIngressController) Init() {
 	framework.Logf("ingress controller running in pod %v", cont.pod.Name)
 }
 
+// TearDown cleans up the NginxIngressController.
+func (cont *NginxIngressController) TearDown() {
+	if cont.lbSvc == nil {
+		framework.Logf("No LoadBalancer service created, no cleanup necessary")
+		return
+	}
+	e2eservice.WaitForServiceDeletedWithFinalizer(cont.Client, cont.Ns, cont.lbSvc.Name)
+}
+
 func generateBacksideHTTPSIngressSpec(ns string) *networkingv1beta1.Ingress {
 	return &networkingv1beta1.Ingress{
 		ObjectMeta: metav1.ObjectMeta{

test/e2e/network/ingress.go

@@ -738,6 +738,7 @@ var _ = SIGDescribe("Loadbalancing: L7", func() {
 			if ginkgo.CurrentGinkgoTestDescription().Failed {
 				framework.DescribeIng(ns)
 			}
+			defer nginxController.TearDown()
 			if jig.Ingress == nil {
 				ginkgo.By("No ingress created, no cleanup necessary")
 				return