Add libvirt-exporter in Prometheus

Change-Id: I59e904f6b41bc0b4b5f826323c573aa37153321e
Depends-On: I71538bc6b39edaa6a0856c8bba9de11b88cec67a
diff --git a/prometheus/exporters/libvirt/init.yml b/prometheus/exporters/libvirt/init.yml
new file mode 100644
index 0000000..5686f44
--- /dev/null
+++ b/prometheus/exporters/libvirt/init.yml
@@ -0,0 +1,2 @@
+classes:
+- service.prometheus.exporters.libvirt