Comment 0 for bug 1933399

Using latest source code, tox -ecover got failed testcases:

======
Totals
======
Ran: 272 tests in 1.0693 sec.
 - Passed: 260
 - Skipped: 1
 - Expected Fail: 0
 - Unexpected Success: 0
 - Failed: 11
Sum of execute time for each test: 6.2850 sec.
Error log:
AttributeError: 'Query' object has no attribute 'with_lockmode'

# git log
commit 5ea67883e1a70cf713cdfd14db5696faaeda2659 (origin/master, origin/HEAD, gerrit/master)
Merge: d9a27f5 40ca546
Author: Zuul <email address hidden>
Date: Wed Jun 9 08:50:44 2021 +0000

    Merge "Fill the msg of exception"