Add PVC role tasks to update-pvc-daemons

Ensures that configurations are always updated whenever the daemons are.
This will be necessary for 0.9.83 with the fundamental change from
pvcXd.yaml to pvc.conf configuration formats, while also ensuring that
future daemon updates also include any configuration changes that may be
pending in the group_vars.

oneshot/update-pvc-daemons.yml

@@ -1,4 +1,5 @@
 ---
+# Set the cluster into maintenance mode
 - hosts: all
   remote_user: deploy
   become: yes
@@ -15,6 +16,28 @@
       run_once: yes
       ignore_errors: yes
 
+# Run the PVC daemon role against the system (update pvc.conf)
+- hosts: all
+  remote_user: deploy
+  become: yes
+  become_user: root
+  gather_facts: yes
+  tasks:
+    - set_fact:
+        this_node: "{{ inventory_hostname.split('.')[0] }}"
+
+    - set_fact:
+        is_coordinator: "{% for node in pvc_nodes if node.hostname == this_node %}{{ node.is_coordinator }}{% endfor %}"
+
+    - set_fact:
+        new_host: no
+
+    - name: import PVC daemon role
+      include_role:
+        name: pvc
+        tasks_from: pvc/main.yml
+
+# Install the latest PVC packages & restart daemons to apply
 - hosts: all
   remote_user: deploy
   become: yes
@@ -92,6 +115,7 @@
       become: no
       connection: local
 
+# Set the cluster out of maintenance mode
 - hosts: all
   remote_user: deploy
   become: yes