Sync cluster autoscaler image from upstream magnum build

.gitlab-ci.yml

@@ -25,11 +25,11 @@ k8s.gcr.io/node-problem-detector_sync:
   script:
     - ./sync_image.sh "k8s.gcr.io/node-problem-detector:v0.6.2"
 
-gitlab-registry.cern.ch/cloud/autoscaler/cluster-autoscaler_sync:
+docker.io/openstackmagnum/cluster-autoscaler_sync:
   stage: image_sync
   image: gitlab-registry.cern.ch/cloud/fedora-buildah:rawhide
   script:
-    - ./sync_image.sh "gitlab-registry.cern.ch/cloud/autoscaler/cluster-autoscaler:v1.15.2"
+    - ./sync_image.sh "docker.io/openstackmagnum/cluster-autoscaler:v1.18.1"
 
 gcr.io/google_containers/metrics-server-amd64_sync:
   stage: image_sync