Some distros have converted to systemd for starting RabbitMQ. This has
resulted in:
---
[Call Trace]
./stack.sh:904:restart_rpc_backend
/home/stack/projects/openstack/openstack-dev/devstack/lib/rpc_backend:201:die
[ERROR] /home/stack/projects/openstack/openstack-dev/devstack/lib/rpc_backend:201 Failed to set rabbitmq password
Error on exit
World dumping... see /opt/stack/logs/worlddump-2015-05-29-031618.txt for details
---
Because 'restart_service rabbitmq-server' returns before the server is ready to
accept connections.
Alter the retry loop to only restart the rabbitmq-server every second time
through the loop. Allowing time for the slow rabbit to start.
Closes-Bug: 1449056
Change-Id: Ibb291c1ecfd109f9ed10b5f194933364985cc1ce
6bc905c348