This patch adds 2 new variables into group_vars: oslomsg_notify_policies
and oslomsg_rpc_policies. These variables contain default rabbitmq
policies, which will be applied for every vhost.
As for now they contain only 1 policy, which enables HA mode[0].
[0] - https://www.rabbitmq.com/ha.html
Change-Id: I6857b2f8ccab169a2317b1de4cc106404534e3e4
4f8a2ccb7b