Update addon-manager changelog/image

cluster/addons/addon-manager/CHANGELOG.md

+### Version 9.0  (Wed January 16 2019 Jordan Liggitt <liggitt@google.com>)
+ - Prune workload resources via apps/v1 APIs
+ - Update kubectl to v1.13.2.
+
 ### Version 8.9  (Fri October 19 2018 Jeff Grafton <jgrafton@google.com>)
  - Update to use debian-base:0.4.0.
  - Update kubectl to v1.11.3.

cluster/gce/manifests/kube-addon-manager.yaml

@@ -14,7 +14,7 @@ spec:
   - name: kube-addon-manager
     # When updating version also bump it in:
     # - test/kubemark/resources/manifests/kube-addon-manager.yaml
-    image: k8s.gcr.io/kube-addon-manager:v8.9
+    image: k8s.gcr.io/kube-addon-manager:v9.0
     command:
     - /bin/bash
     - -c

test/kubemark/resources/manifests/kube-addon-manager.yaml

@@ -9,7 +9,7 @@ spec:
   hostNetwork: true
   containers:
   - name: kube-addon-manager
-    image: {{kube_docker_registry}}/kube-addon-manager:v8.9
+    image: {{kube_docker_registry}}/kube-addon-manager:v9.0
     command:
     - /bin/bash
     - -c