Implement the remote collectd service

This change refactors the collectd formula to be able to install
another collectd instance in charge of running the remote plugins.
diff --git a/metadata/service/remote_client/init.yml b/metadata/service/remote_client/init.yml
new file mode 100644
index 0000000..163f0c4
--- /dev/null
+++ b/metadata/service/remote_client/init.yml
@@ -0,0 +1,10 @@
+applications:
+- collectd
+classes:
+- service.collectd.support
+parameters:
+  collectd:
+    remote_client:
+      enabled: true
+      read_interval: 10
+      use_fqdn: false