orchestrate-devstack: Copy controller ceph.conf and keyrings to subnode

This change introduces a basic role to copy the contents of /etc/ceph
between the controller and subnodes during orchestrate-devstack allowing
a multinode ceph job to be introduced by
I9ffdff44a3ad42ebdf26ab72e24dfe3b12b1ef8b.

Note that this role is only used when devstack-plugin-ceph is enabled.

Change-Id: I324c0f35db34f8540ca164bf8c6e3dea67c5b1b4
diff --git a/roles/orchestrate-devstack/tasks/main.yaml b/roles/orchestrate-devstack/tasks/main.yaml
index f747943..2b8ae01 100644
--- a/roles/orchestrate-devstack/tasks/main.yaml
+++ b/roles/orchestrate-devstack/tasks/main.yaml
@@ -18,6 +18,11 @@
       name: sync-devstack-data
     when: devstack_services['tls-proxy']|default(false)
 
+  - name: Sync controller ceph.conf and key rings to subnode
+    include_role:
+      name: sync-controller-ceph-conf-and-keys
+    when: devstack_plugins is defined and 'devstack-plugin-ceph' in devstack_plugins
+
   - name: Run devstack on the sub-nodes
     include_role:
       name: run-devstack