Remove use of v1beta3 from ES logging

cluster/addons/fluentd-elasticsearch/es-controller.yaml

@@ -20,7 +20,7 @@ spec:
         kubernetes.io/cluster-service: "true"
     spec:
       containers:
-      - image: gcr.io/google_containers/elasticsearch:1.5
+      - image: gcr.io/google_containers/elasticsearch:1.7
         name: elasticsearch-logging         
         resources:
           limits:

cluster/addons/fluentd-elasticsearch/es-image/Makefile

@@ -2,7 +2,7 @@
 
 # The current value of the tag to be used for building and
 # pushing an image to gcr.io
-TAG = 1.5
+TAG = 1.7
 
 build:	elasticsearch_logging_discovery
 	docker build -t gcr.io/google_containers/elasticsearch:$(TAG) .