Fix race condition in real/all integration tests.
Fix race condition in real/all integration tests.

If the tests are running quickly then the time target might end up the same as the end time of the prior full backup. That means restore auto-select will not pick it as a candidate and restore the last backup instead causing the restore compare to fail.

So, sleep one second.

pgbackrest/pgbackrest,pgbackrest/pgbackrest,pgbackrest/pgbackrest,pgmasters/backrest,pgmasters/backrest