text: Title: Fix reflector List cancellation
  Body: **What type of PR is this?**
  /kind bug
  
  **What this PR does / why we need it**:
  When closing stopCh informer could hang on List call indefinitely.
  
  **Does this PR introduce a user-facing change?**:
  ```release-note
  NONE
  ```
  
  /cc @kubernetes/sig-api-machinery-bugs 