Follow up on new execution node creation

- hop nodes are descoped
- links need to be created on execution node creation
- expose the 'edit' capabilities on the instance serializer

awx/main/models/ha.py

@@ -424,7 +424,7 @@ def on_instance_group_saved(sender, instance, created=False, raw=False, **kwargs
 @receiver(post_save, sender=Instance)
 def on_instance_saved(sender, instance, created=False, raw=False, **kwargs):
     # TODO: handle update to instance
-    if settings.IS_K8S and created and instance.node_type in ('execution', 'hop'):
+    if settings.IS_K8S and created and instance.node_type in (Instance.Types.EXECUTION,):
         from awx.main.tasks.receptor import write_receptor_config  # prevents circular import
 
         # on commit broadcast to all control instance to update their receptor configs

awx/main/tasks/receptor.py

@@ -641,7 +641,7 @@ RECEPTOR_CONFIG_STARTER = (
 def write_receptor_config():
     receptor_config = list(RECEPTOR_CONFIG_STARTER)
 
-    instances = Instance.objects.exclude(node_type='control')
+    instances = Instance.objects.filter(node_type=Instance.Types.EXECUTION)
     for instance in instances:
         peer = {'tcp-peer': {'address': f'{instance.hostname}:{instance.listener_port}', 'tls': 'tlsclient'}}
         receptor_config.append(peer)