Update the named alias to the configuration.

    Returns {updated: true} if the alias was updated and returns
    {updated: False} if the alias was not updated.

    CLI Example:

    .. code-block:: bash

        salt myminion boto_lamba.update_alias my_lambda my_alias $LATEST

def update_alias(FunctionName, Name, FunctionVersion=None, Description=None,
                 region=None, key=None, keyid=None, profile=None):
    '''
    Update the named alias to the configuration.

    Returns {updated: true} if the alias was updated and returns
    {updated: False} if the alias was not updated.

    CLI Example:

    .. code-block:: bash

        salt myminion boto_lamba.update_alias my_lambda my_alias $LATEST

    '''

    try:
        conn = _get_conn(region=region, key=key, keyid=keyid, profile=profile)
        args = {}
        if FunctionVersion:
            args['FunctionVersion'] = FunctionVersion
        if Description:
            args['Description'] = Description
        r = conn.update_alias(FunctionName=FunctionName, Name=Name, **args)
        if r:
            keys = ('Name', 'FunctionVersion', 'Description')
            return {'updated': True, 'alias': dict([(k, r.get(k)) for k in keys])}
        else:
            log.warning('Alias was not updated')
            return {'updated': False}
    except ClientError as e:
        return {'created': False, 'error': __utils__['boto3.get_error'](e)}