Add service policies defenition

In order to allow definition of policies per service, we need to add variables
to service roles, that will be passed to openstack.osa.mq_setup.

Currently this can be handled by leveraging group_vars and overriding `oslomsg_rpc_policies` as a whole, but it's not obvious and
can be non-trivial for some groups which are co-locating multiple services
or in case of metal deployments.

Change-Id: I1258e2dc385d8d004091167835e9c14e314cbc2b

defaults/main.yml

@@ -189,6 +189,7 @@ swift_reselleradmin_role: ResellerAdmin
 ## Oslo Messaging
 
 # Notify
+swift_oslomsg_notify_policies: []
 swift_oslomsg_notify_host_group: "{{ oslomsg_notify_host_group | default('rabbitmq_all') }}"
 swift_oslomsg_notify_setup_host: "{{ (swift_oslomsg_notify_host_group in groups) | ternary(groups[swift_oslomsg_notify_host_group][0], 'localhost') }}"
 swift_oslomsg_notify_transport: "{{ oslomsg_notify_transport | default('rabbit') }}"

tasks/main.yml

@@ -162,6 +162,7 @@
     _oslomsg_notify_password: "{{ swift_oslomsg_notify_password }}"
     _oslomsg_notify_vhost: "{{ swift_oslomsg_notify_vhost }}"
     _oslomsg_notify_transport: "{{ swift_oslomsg_notify_transport }}"
+    _oslomsg_notify_policies: "{{ swift_oslomsg_notify_policies }}"
   tags:
     - always