- rename action and serial to kolla_ansible and kolla_serial
- use become instead of "sudo <command>" in shell
- Remove quota for failed_when and changed_when in rabbitmq tasks
Change-Id: I78cb60168aaa40bb6439198283546b7faf33917c
Implements: blueprint migrate-to-ansible-2-2-0
Rollout redis container in master/slave configuration
Deploy redis-sentinel and connect to redis cluster
Redis is needed for mistral coordination backend.
Partial-Bug: #1700591
Change-Id: Ic0269d0db10624925e7bcdbf0e33ae87b84a9cf2