Fix location of lb_front_list formation code in DecortController.lb_update method

module_utils/decort_utils.py

@@ -4478,9 +4478,6 @@ class DecortController(object):
         
         #FE
 
-        mod_front_list = [front['name'] for front in mod_frontends]
-        lb_front_list = [front['name'] for front in lb_frontends]
-        
         if del_list_backs:
             
             self._lb_delete_backends(
@@ -4503,6 +4500,9 @@ class DecortController(object):
                 mod_servers    
             )
         
+        mod_front_list = [front['name'] for front in mod_frontends]
+        lb_front_list = [front['name'] for front in lb_frontends]
+
         del_list_fronts = set(lb_front_list).difference(mod_front_list)
         add_list_fronts = set(mod_front_list).difference(lb_front_list)
         upd_front_list = set(lb_front_list).intersection(mod_front_list)