Add prometheus collector

Change-Id: I7f9b2d5f77bbbce9a2f1b8b1812a08711be84496
diff --git a/prometheus/collector/init.yml b/prometheus/collector/init.yml
new file mode 100644
index 0000000..47b9ff9
--- /dev/null
+++ b/prometheus/collector/init.yml
@@ -0,0 +1,2 @@
+classes:
+- service.prometheus.collector