fix(elasticsearch): rename .yml to yaml so it gets picked up by helm

elasticsearch/Chart.yaml

@@ -3,6 +3,6 @@ home: https://github.com/elastic/elasticsearch
 version: 0.2.0
 description: Elasticsearch Restful Search Engine
 maintainers:
-  -  <icoffey@deis.com>
+  - Ian Coffey <icoffey@deis.com>
 details:
   This Chart provides a basic Elasticsearch search service.

elasticsearch/manifests/elasticsearch-rc.yaml

@@ -7,8 +7,11 @@ metadata:
     heritage: helm
 spec:
   replicas: 1
+  selector:
+    provider: elasticsearch
   template:
     metadata:
+      name: elasticsearch
       labels:
         provider: elasticsearch
     spec:
@@ -18,3 +21,4 @@ spec:
         ports:
         - containerPort: 9200
         - containerPort: 9300
+