Added DS_Store to ignore and fixed the broken test which supports newer and older versions of celery

Author: seanpar203

.gitignore

@@ -105,3 +105,4 @@ ENV/
 
 .envrc
 .direnv
+.DS_Store

health_check/contrib/celery_ping/backends.py

@@ -50,12 +50,9 @@ def _check_ping_result(self, ping_result):
             self._check_active_queues(active_workers)
 
     def _check_active_queues(self, active_workers):
-        try:
-            # Celery 4+
-            defined_queues = app.conf.task_queues
-        except AttributeError:
-            # Celery <4
-            defined_queues = app.conf.CELERY_QUEUES
+        defined_queues = getattr(app.conf, "task_queues", None) or getattr(
+            app.conf, "CELERY_QUEUES", None
+        )
 
         if not defined_queues:
             return