Self nominate Kevin Hannon for reviewer for job controller

I have been lead the PodReplacementPolicy KEP for alpha and I helped review/fix some issues in beta.  

https://github.com/kubernetes/kubernetes/pulls?q=+is%3Apr+reviewed-by%3Akannon92+label%3Asig%2Fapps+

I have also been an active reviewer and helped GA job tracking last release.  I hope to continue reviewing Job related code.

Author: kannon92

pkg/controller/job/OWNERS

@@ -6,5 +6,6 @@ approvers:
 reviewers:
   - sig-apps-reviewers
   - mimowo
+  - kannon92
 labels:
   - sig/apps