Updated openstack/openstack
Project: openstack-dev/devstack  bd9dbef9329ef4dad0a5ecb3dca29dd9a282c2dc
null
use "rabbit_hosts" config option instead of "rabbit_host"

This allows for easy client configuration against clustered RabbitMQ
setups.  Does not break existing configs.

Change-Id: I2b180f8860a727e35d7b465253689e5e8c44eb98
Closes-Bug: 1286411