Update influxdb to 0.12.0

cluster/addons/cluster-monitoring/influxdb/influxdb-grafana-controller.yaml

 apiVersion: v1
 kind: ReplicationController
 metadata:
-  name: monitoring-influxdb-grafana-v3
+  name: monitoring-influxdb-grafana-v4
   namespace: kube-system
   labels: 
     k8s-app: influxGrafana
-    version: v3
+    version: v4
     kubernetes.io/cluster-service: "true"
 spec: 
   replicas: 1
   selector: 
     k8s-app: influxGrafana
-    version: v3
+    version: v4
   template: 
     metadata: 
       labels: 
         k8s-app: influxGrafana
-        version: v3
+        version: v4
         kubernetes.io/cluster-service: "true"
     spec: 
       containers: 
-        - image: gcr.io/google_containers/heapster_influxdb:v0.5
+        - image: gcr.io/google_containers/heapster_influxdb:v0.7
           name: influxdb
           resources:
             # keep request = limit to keep this container in guaranteed class