Add peers_from_control_nodes to ReceptorAddress

- write_receptor_config peers to ReceptorAddress entries
that have peers_from_control_nodes enabled

- peers_from_control_nodes and listener_port removed from Instance model

- peers_from_control_nodes added to ReceptorAddress model

- ReceptorAddress is now unique by address and protocol combination

- Write receptor config task is dispatched upon ReceptorAddress creation
or deletion, and when control node is first created

- InstanceLinkSerializer adds a target_address field and has logic
to grab the instance hostname associated with the peered ReceptorAddress

Signed-off-by: Seth Foster <fosterbseth@gmail.com>

awx/main/tasks/system.py

@@ -495,7 +495,7 @@ def inspect_established_receptor_connections(mesh_status):
     update_links = []
     for link in all_links:
         if link.link_state != InstanceLink.States.REMOVING:
-            if link.target.hostname in active_receptor_conns.get(link.source.hostname, {}):
+            if link.target.instance.hostname in active_receptor_conns.get(link.source.hostname, {}):
                 if link.link_state is not InstanceLink.States.ESTABLISHED:
                     link.link_state = InstanceLink.States.ESTABLISHED
                     update_links.append(link)