Merge pull request #9018 from Gacko/qinxy

Ingress NGINX: Promote NGINX v2.2.7.

Author: k8s-ci-robot

registry.k8s.io/images/k8s-staging-ingress-nginx/images.yaml

@@ -352,6 +352,7 @@
     "sha256:9d332a514963da87b89ddfea6c1d8cae4c17469dc16e5febac8efa1395b4ea57": ["v2.2.4"]
     "sha256:267a9064ad836d0f16354270abf48928f64d1c303cf4d3577e941be4f88d0a96": ["v2.2.5"]
     "sha256:882bb8dcbce55118ae97fbfbf9c4e654f121b041df53392cd7a192df94bccf74": ["v2.2.6"]
+    "sha256:24195cbc45fffa835c4c2b078985106aa4506d8eb7f603722accf12a7aef8983": ["v2.2.7"]
 
 # Ingress NGINX: Test Runner
 - name: e2e-test-runner