Run multiple HA relationships in hub-and-spoke configuration
This is the actual implementation of the hub-and-spoke model described in the design ticket: #1149 (closed)
It should add the logic to run multiple HAService instances concurrently. The major issue is to implement the callouts for the subnet4_select and subnet6_select hook points that would be used in the hub-and-spoke configuration to select the relationship based on the selected subnet. We should also test that the HAService instances do not stomp on each other, that are thread safe etc. After this ticket, the hub-and-spoke configuration should be usable, at least in a basic form.
Edited by Tomek Mrugalski