Title: #5596: ipatests: use whole date when calling journalctl --since
The test test_commands.py::TestIPACommand::test_ssh_key_connection
is checking the content of the journal using journalctl --since ...
but provides only the time, not the whole date with year-month-day.
As a consequence, if the test is executed around midnight it may
find nothing in the journal because it's looking for logs after 11:50PM,
which is a date in the future.
The fix provides a complete date with year-month-day hours:min:sec.
To pull the PR as Git branch:
git remote add ghfreeipa https://github.com/freeipa/freeipa
git fetch ghfreeipa pull/5596/head:pr5596
git checkout pr5596