Assign new network and description attribute to Monitor role

This change adds the networks and description attributes for the
Ceph Monitor role to roles_data during upgrade.

Change-Id: If29c237d8a8e0f644d36c1e839b813d7f18a677f

tasks/upgrade/convert_roles_data.yaml

@@ -143,6 +143,15 @@
         - '\1\n  networks:\n    - InternalApi'
         - '\1\n  description: |\n    Standalone messaging role with RabbitMQ being managed via Pacemaker'
 
+    - name: Assigns new attributes to Monitor role
+      replace:
+        dest: '{{ custom_roles_file.stdout }}'
+        regexp: '^(- name: Monitor.*)'
+        replace: "{{ item }}"
+      with_items:
+        - '\1\n  networks:\n    - Storage'
+        - '\1\n  description: |\n    Ceph Monitor role'
+
     - name: Add services common to all roles introduced in Pike
       replace:
         dest: '{{ custom_roles_file.stdout }}'