Get a list of policy names from a role.

    CLI Example:

    .. code-block:: bash

        salt myminion boto_iam.list_role_policies myirole

def list_role_policies(role_name, region=None, key=None, keyid=None,
                       profile=None):
    '''
    Get a list of policy names from a role.

    CLI Example:

    .. code-block:: bash

        salt myminion boto_iam.list_role_policies myirole
    '''
    conn = _get_conn(region=region, key=key, keyid=keyid, profile=profile)

    try:
        response = conn.list_role_policies(role_name)
        _list = response.list_role_policies_response.list_role_policies_result
        return _list.policy_names
    except boto.exception.BotoServerError as e:
        log.debug(e)
        return []