Add a temp workaround for an issue #153 in rabbit cookbook

After configuring rabbitmq, restart the service to make configuration
take effect. So during OpenStack deployment, OpenStack services can
connect to rabbitmq successfully.
This workaround will notify rabbitmq-server to restart immediately.
This could be remove once the issue #153 is fixed in rabbit cookbook.

Change-Id: Ib017226f46c7e26429bb26df5b63525e1a98bc82
Closes-Bug: #1380940