The host list order seen during Ansible handlers may differ to the usual
play host list order, due to race conditions in notifying handlers. This
means that restart_services.yml for RabbitMQ may be included in a
different order than the rabbitmq group, resulting in a node other than
the 'first' being restarted first. This can cause some nodes to fail to
join the cluster. The include_tasks loop was introduced in [1].
This change fixes the issue by splitting the handler into two tasks, and
restarting the first node before all others.
[1] https://review.opendev.org/c/openstack/kolla-ansible/+/763137
Change-Id: I1823301d5889589bfd48326ed7de03c6061ea5ba
Closes-Bug: #1930293
0cd5b027c9