Ticket 49337 - Add regression tests for import tests
    
    Description: When troubleshooting TET failed tests, it was found that
    adding a database entry fails, if the same database was deleted after
    an import.
    
    https://pagure.io/389-ds-base/issue/49337
    
    Reviewed by: spichugi
    
    Signed-off-by: Simon Pichugin <spichugi@redhat.com>