When 15 or so close relatives of Bob Dole's appeared outside the convention center Monday morning, they were denied entrance by the ubiquitous security guards. Why? It seemed no one in the Dole campaign had bothered to obtain credentials for them. When deputy campaign manager Rick Davis learned of the situation, he did what any loyal campaign staffer would do: He yanked the credentials from the neck of any Dole campaign staffer standing nearby and passed them to the Dole clan.