Add client role

The client role is responsible for provisioning the users, databases
and privileges. It is required when running InfluxDB in a container
because the deployment of InfluxDB and the provisioning phase are
decoupled. Non-containerized deployments are left unchanged with the
provisioning managed by the server state.

Change-Id: I7c9a05f2109f76aadf84953374c740a865d59106
diff --git a/metadata/service/client.yml b/metadata/service/client.yml
new file mode 100644
index 0000000..d64d7a1
--- /dev/null
+++ b/metadata/service/client.yml
@@ -0,0 +1,6 @@
+applications:
+- influxdb
+parameters:
+  influxdb:
+    client:
+      enabled: true