Peer addition won't be skipped if remote is not in peer

rbd-mirroring is not configured as adding peer is getting skipped.
Peer addition should not get skipped if its not added already

Closes - https://bugzilla.redhat.com/show_bug.cgi?id=1942444

Signed-off-by: VasishtaShastry <vipin.indiasmg@gmail.com>
(cherry picked from commit 006998e)

roles/ceph-rbd-mirror/tasks/configure_mirroring.yml

@@ -11,4 +11,4 @@
 - name: add a mirroring peer
   command: "{{ container_exec_cmd | default('') }} rbd --cluster {{ cluster }} --keyring /etc/ceph/{{ cluster }}.client.rbd-mirror.{{ ansible_facts['hostname'] }}.keyring --name client.rbd-mirror.{{ ansible_facts['hostname'] }} mirror pool peer add {{ ceph_rbd_mirror_pool }} {{ ceph_rbd_mirror_remote_user }}@{{ ceph_rbd_mirror_remote_cluster }}"
   changed_when: false
-  when: ceph_rbd_mirror_remote_user in mirror_peer.stdout
+  when: ceph_rbd_mirror_remote_user not in mirror_peer.stdout