facts: fix mgr/mon collocation

`service dump` hangs when no active mgr is available.

Signed-off-by: Guillaume Abrioux <gabrioux@redhat.com>

Author: guits

roles/ceph-facts/tasks/facts.yml

@@ -184,6 +184,7 @@
   when:
     - (inventory_hostname in groups.get(rgw_group_name, []) or inventory_hostname in groups.get(nfs_group_name, []))
     - groups.get(mon_group_name, []) | length > 0
+    - handler_mgr_status | default(False)
   block:
     - name: get ceph current status
       command: "{{ timeout_command }} {{ _container_exec_cmd | default('') }} ceph --cluster {{ cluster }} service dump -f json"