client: do not rely on copy_admin_key to import keys

Relying on `copy_admin_key` to import created keys on client nodes makes
us obliged to copy admin key on those nodes which is not something we might
want.
We should use the fact `condition_copy_admin_key` which will be set to
`True` when the delegated node is a mon which means we can import keys
without taking care of admin keyring.

Fixes: #2867

Signed-off-by: Guillaume Abrioux <gabrioux@redhat.com>
(cherry picked from commit 5ef5fcd0b6)

roles/ceph-client/tasks/create_users_keys.yml

@@ -50,7 +50,7 @@
     containerized: "{{ docker_exec_cmd | default('') }}"
     cluster: "{{ cluster }}"
     dest: "{{ ceph_conf_key_directory }}"
-    import_key: "{{ copy_admin_key }}"
+    import_key: "{{ condition_copy_admin_key }}"
     mode: "{{ item.mode|default(omit) }}"
   with_items: "{{ keys }}"
   delegate_to: "{{ delegated_node }}"