Manage Kibana objects

This patch adds a salt state module to manage Kibana objects. It also
adds the client to install these objects.
diff --git a/metadata/service/client.yml b/metadata/service/client.yml
new file mode 100644
index 0000000..1291f37
--- /dev/null
+++ b/metadata/service/client.yml
@@ -0,0 +1,6 @@
+applications:
+- kibana.client
+parameters:
+  kibana:
+    client:
+      enabled: true