adopt: fix bug in mon_ip_list set_fact

`default('{}')` must be before `| from_json`

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

infrastructure-playbooks/cephadm-adopt.yml

@@ -468,7 +468,7 @@
             - name: set_fact mon_ip_list
               set_fact:
                 mon_ip_list: "{{ mon_ip_list | default([]) | union([item['addr'].split(':')[0]]) }}"
-              loop: "{{ (quorum_status.stdout | from_json | default('{}'))['monmap']['mons'] }}"
+              loop: "{{ (quorum_status.stdout | default('{}') | from_json)['monmap']['mons'] }}"
               run_once: true
 
             - name: remove current mirror peer