Call non-blocking informerFactory.Start synchronously to avoid races

Signed-off-by: Dr. Stefan Schimanski <[email protected]>

Kubernetes-commit: c7a1fa432a87579895eac4b3873162d5f1dba7f5

Author: sttts

Diff for: cmd/informer-gen/generators/factory.go

@@ -299,6 +299,7 @@ type SharedInformerFactory interface {
 
 	// Start initializes all requested informers. They are handled in goroutines
 	// which run until the stop channel gets closed.
+	// Warning: Start does not block. When run in a go-routine, it will race with a later WaitForCacheSync.
         Start(stopCh <-chan struct{})
 
 	// Shutdown marks a factory as shutting down. At that point no new