Merge pull request #11123 from batrick/ceph-create-keys-bugfix

ceph-create-keys: add missing argument comma

Reviewed-by: Kefu Chai <kchai@redhat.com>
Reviewed-by: John Spray <john.spray@redhat.com>

src/ceph-create-keys

@@ -109,7 +109,7 @@ def get_key(cluster, mon_id):
                 returncode = subprocess.call(
                     args=args_prefix + [
                         'auth',
-                        'get'
+                        'get',
                         'client.admin',
                         ],
                     stdout=f,