addons: Update heapster from v1.4.3 to v1.5.0

* Rollback addon-resizer to 1.7 to address issues in large
clusters https://github.com/kubernetes/kubernetes/pull/52536

addons/heapster/deployment.yaml

@@ -1,4 +1,4 @@
-apiVersion: extensions/v1beta1
+apiVersion: apps/v1beta2
 kind: Deployment
 metadata:
   name: heapster
@@ -19,7 +19,7 @@ spec:
     spec:
       containers:
         - name: heapster
-          image: gcr.io/google_containers/heapster-amd64:v1.4.3
+          image: gcr.io/google_containers/heapster-amd64:v1.5.0
           command:
             - /heapster
             - --source=kubernetes.summary_api:''
@@ -31,16 +31,18 @@ spec:
             initialDelaySeconds: 180
             timeoutSeconds: 5
         - name: heapster-nanny
-          image: gcr.io/google_containers/addon-resizer:2.0
+          image: gcr.io/google_containers/addon-resizer:1.7
           command:
             - /pod_nanny
             - --cpu=80m
             - --extra-cpu=0.5m
             - --memory=140Mi
             - --extra-memory=4Mi
+            - --threshold=5
             - --deployment=heapster
             - --container=heapster
             - --poll-period=300000
+            - --estimator=exponential
           env:
             - name: MY_POD_NAME
               valueFrom: