Fix openapi schema (#2013)

* fix openapi spec

fix openapi schema bug

* fix api schema bug

pkg/informers/null_informers.go

@@ -0,0 +1,34 @@
+package informers
+
+import (
+	appinformers "github.com/kubernetes-sigs/application/pkg/client/informers/externalversions"
+	istioinformers "istio.io/client-go/pkg/informers/externalversions"
+	"k8s.io/client-go/informers"
+	ksinformers "kubesphere.io/kubesphere/pkg/client/informers/externalversions"
+)
+
+type nullInformerFactory struct {
+}
+
+func NewNullInformerFactory() InformerFactory {
+	return &nullInformerFactory{}
+}
+
+func (n nullInformerFactory) KubernetesSharedInformerFactory() informers.SharedInformerFactory {
+	return nil
+}
+
+func (n nullInformerFactory) KubeSphereSharedInformerFactory() ksinformers.SharedInformerFactory {
+	return nil
+}
+
+func (n nullInformerFactory) IstioSharedInformerFactory() istioinformers.SharedInformerFactory {
+	return nil
+}
+
+func (n nullInformerFactory) ApplicationSharedInformerFactory() appinformers.SharedInformerFactory {
+	return nil
+}
+
+func (n nullInformerFactory) Start(stopCh <-chan struct{}) {
+}