Add ReceptorAddress to root urls

- Add database contraints to make sure addresses
are unique
If port is defined:
address, port, protocol, websocket_path are unique together

if port is not defined:
address, protocol, websocket_path are unique together

- Allow deleting address via API
- Add ReceptorAddressAccess to determine permissions
- awx-manage add_receptor_address returns changed: True
if successful

awx/main/access.py

@@ -57,6 +57,7 @@ from awx.main.models import (
     Project,
     ProjectUpdate,
     ProjectUpdateEvent,
+    ReceptorAddress,
     Role,
     Schedule,
     SystemJob,
@@ -2430,6 +2431,29 @@ class InventoryUpdateEventAccess(BaseAccess):
         return False
 
 
+class ReceptorAddressAccess(BaseAccess):
+    """
+    I can see receptor address records whenever I can access the instance
+    """
+
+    model = ReceptorAddress
+
+    def filtered_queryset(self):
+        return self.model.objects.filter(Q(instance__in=Instance.accessible_pk_qs(self.user, 'read_role')))
+
+    @check_superuser
+    def can_add(self, data):
+        return False
+
+    @check_superuser
+    def can_change(self, obj, data):
+        return False
+
+    @check_superuser
+    def can_delete(self, obj):
+        return False
+
+
 class SystemJobEventAccess(BaseAccess):
     """
     I can only see manage System Jobs events if I'm a super user