fixed sanity-check on parent in restart_services

sau/services.py

@@ -124,12 +124,12 @@ def restart_services():
     tested_parents = set()
     for proc in retest_procs:
         parent = _get_top_parent(proc)
+        if not parent:
+            continue
         parent_name = parent.name()
         if parent in tested_parents:
             log.debug('{} belongs to already tested parent {}'.format(proc, parent))
             continue
-        if not parent:
-            continue
 
         if _get_deleted_open_files(proc):
             tested_parents.add(parent)