fix ut

Signed-off-by: Wenqi Qiu <wenqi.qiu@broadcom.com>

Author: wenqiq

pkg/nsx/client.go

@@ -376,6 +376,11 @@ func (client *Client) NSXCheckVersion(feature int) bool {
 		return true
 	}
 
+	if client.NSXVerChecker.cluster == nil {
+		log.Error(errors.New("NSX cluster is nil"), "cannot check NSX version", "feature", FeaturesName[feature])
+		return false
+	}
+
 	nsxVersion, err := client.NSXVerChecker.cluster.GetVersion()
 	if err != nil {
 		log.Error(err, "Get version error")