DAOS-14592 test: Fix dmg_system_reformat engine restart detection (#1…

…3454)

When detecting if the engines have restarted in dmg_system_reformat, use
the time since the restart as opposed to the original start time.

Signed-off-by: Phil Henderson <[email protected]>

src/tests/ftest/control/dmg_system_reformat.py

@@ -1,5 +1,5 @@
 """
-  (C) Copyright 2020-2023 Intel Corporation.
+  (C) Copyright 2020-2024 Intel Corporation.
 
   SPDX-License-Identifier: BSD-2-Clause-Patent
 """
@@ -8,6 +8,7 @@
 from apricot import TestWithServers
 from avocado.core.exceptions import TestFail
 from exception_utils import CommandFailure
+from general_utils import journalctl_time
 from test_utils_pool import add_pool, get_size_params
 
 
@@ -91,6 +92,7 @@ def test_dmg_system_reformat(self):
 
         # Check that engine starts up again
         self.log.info("<SERVER> Waiting for the engines to start")
+        self.server_managers[-1].manager.timestamps["start"] = journalctl_time()
         self.server_managers[-1].detect_engine_start()
 
         # Check that we have cleared storage by checking pool list