Test rescheduling on various events.

- Add resyncPeriod parameter for setupCluster to make resync period of
scheduler configurable.
- Add test case for static provisioning and delay binding storage class.
Move pods into active queue on PV add/update events.
- Add a stress test with scheduler resync to detect possible race
conditions.

test/integration/scheduler/util.go

@@ -141,7 +141,7 @@ func initTestScheduler(
 ) *TestContext {
 	// Pod preemption is enabled by default scheduler configuration, but preemption only happens when PodPriority
 	// feature gate is enabled at the same time.
-	return initTestSchedulerWithOptions(t, context, controllerCh, setPodInformer, policy, false)
+	return initTestSchedulerWithOptions(t, context, controllerCh, setPodInformer, policy, false, time.Second)
 }
 
 // initTestSchedulerWithOptions initializes a test environment and creates a scheduler with default
@@ -153,6 +153,7 @@ func initTestSchedulerWithOptions(
 	setPodInformer bool,
 	policy *schedulerapi.Policy,
 	disablePreemption bool,
+	resyncPeriod time.Duration,
 ) *TestContext {
 	// Enable EnableEquivalenceClassCache for all integration tests.
 	defer utilfeaturetesting.SetFeatureGateDuringTest(
@@ -161,7 +162,7 @@ func initTestSchedulerWithOptions(
 		features.EnableEquivalenceClassCache, true)()
 
 	// 1. Create scheduler
-	context.informerFactory = informers.NewSharedInformerFactory(context.clientSet, time.Second)
+	context.informerFactory = informers.NewSharedInformerFactory(context.clientSet, resyncPeriod)
 
 	var podInformer coreinformers.PodInformer
 
@@ -253,7 +254,7 @@ func initTest(t *testing.T, nsPrefix string) *TestContext {
 // configuration but with pod preemption disabled.
 func initTestDisablePreemption(t *testing.T, nsPrefix string) *TestContext {
 	return initTestSchedulerWithOptions(
-		t, initTestMaster(t, nsPrefix, nil), nil, true, nil, true)
+		t, initTestMaster(t, nsPrefix, nil), nil, true, nil, true, time.Second)
 }
 
 // cleanupTest deletes the scheduler and the test namespace. It should be called