Get information about the Opsview monitoring servers
        http://docs.opsview.com/doku.php?id=opsview4.6:restapi#server_information

def server_info(self, verbose=False):
        '''
        Get information about the Opsview monitoring servers
        http://docs.opsview.com/doku.php?id=opsview4.6:restapi#server_information
        '''
        url = '{}/{}'.format(self.rest_url, 'serverinfo')
        return self.__auth_req_get(url, verbose=verbose)