Add default_metric label

This metric will be used to expose metrics gathered from logs

Introduce system/init.yml which will store system wide params

Change-Id: Ieb3ef83ace82f6f3f1b6a6772b309bc89442705f
diff --git a/fluentd/init.yml b/fluentd/init.yml
new file mode 100644
index 0000000..ebf469a
--- /dev/null
+++ b/fluentd/init.yml
@@ -0,0 +1,6 @@
+classes:
+- service.fluentd.agent.single
+- system
+parameters:
+  fluentd:
+    dollar: ${_param:dollarsign}