Shuffle AMQP nodes for all OpenStack services.

- Assign 127.0.0.1 as first server in HA
- Rotate servers using RR to have better balance
- delete.rb from upstream to fix bug with deletion

Related-Bug: 1320184
Change-Id: I3762dedfa06d593f4347e246b4302852261f82cb
(cherry picked from commit 695aa4118afcd514d1b6abffe2e83679fd6a1cac)
Merge "Shuffle AMQP nodes for all OpenStack services." into stable/4.1