kibana: allow use of server.basePath

When using server.basePath a dynamic bundle optimization will be started.
This job needs write access to /usr/share/kibana/optimize/bundles.

Change-Id: Ieaae79a5940f3972a8067814a1113ef635970875

ansible/roles/kibana/templates/kibana.json.j2

@@ -13,6 +13,11 @@
             "path": "/var/log/kolla/kibana",
             "owner": "kibana:kibana",
             "recurse": true
+        },
+        {
+            "path": "/usr/share/kibana/optimize/bundles",
+            "owner": "kibana:kibana",
+            "recurse": true
         }
     ]
 }