'Driver for ServiceAccount. Calls helpers as needed.
return: (bool, [list of AuditIssues])'

def inspect_serviceaccount(self, item):

    errors = []
    err = self._max_keys(item.config.get('keys'))
    (errors.extend(err) if err else None)
    policies = item.config.get('policy')
    if policies:
        err = self._actor_role(policies)
        (errors.extend(err) if err else None)
    if errors:
        return (False, errors)
    return (True, None)
