[PBCKP-235] fix one test for <15.0

Author: funny-falcon

tests/backup.py

@@ -3441,10 +3441,15 @@ def test_backup_atexit(self):
             self.assertIn(
                 'WARNING: backup in progress, stop backup',
                 log_content)
-            
-            self.assertIn(
-                'FROM pg_catalog.pg_backup_stop',
-                log_content)
+
+            if self.get_version(node) < 150000:
+                self.assertIn(
+                    'FROM pg_catalog.pg_stop_backup',
+                    log_content)
+            else:
+                self.assertIn(
+                    'FROM pg_catalog.pg_backup_stop',
+                    log_content)
 
             self.assertIn(
                 'setting its status to ERROR',