Fix wrong module argument name for kolla_toolbox

should be module_extra_vars rather than module_extra_args.

Change-Id: I31479d54526cba1ae408126bae3cec06fb52deb8
Closes-Bug: #1666026

ansible/roles/ceph/tasks/start_rgw_keystone.yml

@@ -15,7 +15,7 @@
       interface: "{{ item.interface }}"
       region_name: "{{ openstack_region_name }}"
       auth: "{{ '{{ openstack_swift_auth }}' }}"
-    module_extra_args:
+    module_extra_vars:
       openstack_swift_auth: "{{ openstack_swift_auth }}"
   run_once: True
   with_items: