Issue 51188 - db2ldif crashes when LDIF file can't be accessed
    
    Bug Description: db2ldif crashes when we set '-a LDIF_PATH' to a place that
    can't be accessed by the user (dirsrv by default)
    
    Fix Description: Don't attempt to close DB if we bail after a failed
    attempt to open LDIF file.
    
    https://pagure.io/389-ds-base/issue/51188
    
    Reviewed by: mreynolds (Thanks!)