switch2container: fix mon quorum check

The current check makes no sense because it checks any of other monitor
than the one being played (either a previous one already converted or a
next that isn't yet converted) is present on the quorum.

Closes: https://bugzilla.redhat.com/show_bug.cgi?id=1909011

Signed-off-by: Guillaume Abrioux <gabrioux@redhat.com>
(cherry picked from commit 175ffa1b88)

infrastructure-playbooks/switch-from-non-containerized-to-containerized-ceph-daemons.yml

@@ -135,11 +135,10 @@
 
   post_tasks:
     - name: waiting for the monitor to join the quorum...
-      command: "{{ container_exec_cmd }} ceph --cluster {{ cluster }} quorum_status --format json"
+      command: "{{ container_binary }} run --rm  -v /etc/ceph:/etc/ceph:z --entrypoint=ceph {{ ceph_docker_registry }}/{{ ceph_docker_image }}:{{ ceph_docker_image_tag }} --cluster {{ cluster }} quorum_status --format json"
       register: ceph_health_raw
+      until: ansible_hostname in (ceph_health_raw.stdout | trim | from_json)["quorum_names"]
       changed_when: false
-      until: >
-        hostvars[mon_host]['ansible_hostname'] in (ceph_health_raw.stdout | from_json)["quorum_names"]
       retries: "{{ health_mon_check_retries }}"
       delay: "{{ health_mon_check_delay }}"